Effective street lighting has been proven to reduce crime. T

[BTGmoderatorDC]

Effective street lighting has been proven to reduce crime. The city of Shambolia improved its lighting especially in areas where crime levels were particularly high. No substantial change in the amount of criminal activity in those areas was reported. Improved lighting alone is not sufficient to combat crime.

In the argument given, the two portions in boldface play which of the following roles?

A) The first is a general opinion; the second opposes the idea expressed by this opinion.
B) The first is a conclusion; the second is a premise that contradicts this conclusion.
C) The first presents factual information; the second is a conclusion based on this information.
D) The first is a premise; the second concludes the argument by challenging this premise.
E) The first is a piece of evidence; the second makes an inference based on this evidence.

OA D

Source: Economist GMAT

[deloitte247]

Option A :- Incorrect
No opinion can be categorized as general, the presentation of this statement is intact, as the second boldface portion opposes the first one.

Option B :- Incorrect
The first cannot be possibly referenced as a conclusion owing to the fact that it appeared at the beginning of the the sentence.

Option C :- Incorrect
The fact drawn concerning the second statement is true but there may be some reservations about the first statement.

Option D :- correct
This presentation is the best among all options. The first boldface is a set premise and the later is a conclusion from the argument to challenge the set premise.

Option E :- Incorrect
The first can't be an evidence because it is not linking with or referring to any existing point.