Critical Reasoning - Doubting the Validity

[janxavier]

Can some plz tell me why B is the answer for this ?

A recently published paper concludes that tenured professors or those on their way to tenure don't enhance student learning as much as full-time lecturers outside the tenure system. Clearly, the difference between professors in the tenure system and other full-time lecturers has to do with the reward system for the former. The criterion for rewarding tenured faculty typically places a greater emphasis on research than teaching.

The above argument is based on doubts on the validity of which of the following statements?

A. A tenured professor is expected to spend greater time on research activities than on teaching.

B. Non-tenured full time lecturers are rewarded more for the research that they do than for their teaching assignments.

C. The universities are bound by the law to continue with their existing reward systems.

D. Generally, a tenured professor is much more experienced than a non-tenured full time lecturer.

E. No non-tenured professor focuses more on the research activities than teaching in order to become tenured.

[GMATGuruNY]

A recently published paper concludes that tenured professors or those on their way to tenure don't enhance student learning as much as full-time lecturers outside the tenure system. Clearly, the difference between professors in the tenure system and other full-time lecturers has to do with the reward system for the former. The criterion for rewarding tenured faculty typically places a greater emphasis on research than teaching.

The above argument is based on doubts on the validity of which of the following statements?

A. A tenured professor is expected to spend greater time on research activities than on teaching.

B. Non-tenured full time lecturers are rewarded more for the research that they do than for their teaching assignments.

C. The universities are bound by the law to continue with their existing reward systems.

D. Generally, a tenured professor is much more experienced than a non-tenured full time lecturer.

E. No non-tenured professor focuses more on the research activities than teaching in order to become tenured.

Premise: Tenured professors don't enhance student learning as much as full-time lecturers outside the tenure system.
Conclusion: Non-tenured professors are better with students because the criterion for rewarding tenured faculty typically places a greater emphasis on research than teaching.

To justify the conclusion, the passage assumes that one of the five answer choices is UNTRUE.
B: Non-tenured full time lecturers are rewarded more for the research that they do than for their teaching assignments.
If this answer choice is true, then both types of professors -- tenured and non-tenured -- are rewarded more for their research than for their teaching assignments, invalidating the conclusion that non-tenured professors are better with students because the criterion for rewarding tenured faculty typically places a greater emphasis on research than teaching.
Since B invalidates the conclusion, the passage assumes that answer choice B is UNTRUE.

The correct answer is B.

[phanikpk]

In order to doubt the validity of the argument we have to select the statement which can directly counter argue the argument.
Of options, B states that non-tenure full time lecturers are rewarded more than research which is usually going against the argument stated in the passage above where the argument states tenured faculty typically places a greater emphasis on research.
Option A,C,D are OFS
Option E is an strengthener

[sahilsnpt]

Is this a Weaken Question. Because Choice B acts as a weakener than an assumption? I am having a very hard time understanding this question!!
Any help would be appreciated!<i class="em em-stuck_out_tongue_winking_eye"></i>

[RBBmba@2014]

Hi,
Is it an official CR ? Can anyone please share the source ?

[RBBmba@2014]

@GMATGuruNY - do you've any feed about the Source of this CR ? And how do we categorize such CR ?