Critical Reasoning

When astronomers observed the comet Steinman-Arnett 3 becoming 1,000 times brighter in September 1995, they correctly hypothesized that its increased brightness was a result of the comet's breaking up. When comets break up, they
emit large amounts of gas and dust, becoming visibly brighter as a result. However, their observations did not reveal comet Steinman-Arnett 3 actually breaking into pieces until November 1995, even though telescopes were trained
on it throughout the entire period.

Which of the following, if true, most helps to resolve the apparent conflict in the situation above?

(A) Comets often do not emit gas and dust until several weeks after they have begun to break up.
(B) The reason comets become brighter when they break up is that the gas and dust that they emit refract light.
(C) Gas and dust can be released by ! ssures in a comet, even if the comet is not broken all the way through.
(D) The amount of gas and dust emitted steadily increased during the period from September through November.
(E) The comet passed close to the sun during this period and the gravitational strain caused it to break up.

No OA

IMO C

reply2spg wrote:When astronomers observed the comet Steinman-Arnett 3 becoming 1,000 times brighter in September 1995, they correctly hypothesized that its increased brightness was a result of the comet's breaking up. When comets break up, they
emit large amounts of gas and dust, becoming visibly brighter as a result. However, their observations did not reveal comet Steinman-Arnett 3 actually breaking into pieces until November 1995, even though telescopes were trained
on it throughout the entire period.

Which of the following, if true, most helps to resolve the apparent conflict in the situation above?

(A) Comets often do not emit gas and dust until several weeks after they have begun to break up.
(B) The reason comets become brighter when they break up is that the gas and dust that they emit refract light.
(C) Gas and dust can be released by ! ssures in a comet, even if the comet is not broken all the way through.
(D) The amount of gas and dust emitted steadily increased during the period from September through November.
(E) The comet passed close to the sun during this period and the gravitational strain caused it to break up.

No OA

IMO C

I would go with C too

(C) Gas and dust can be released by fissures in a comet, even if the comet is not broken all the way through.

C - explains why they saw increased brightness but not breakage until November.

========================
E - out of scope
D - so what? they already saw brightness in September
B - so what? additional information about why brightness was increased but we are trying to answer why they can't see breakage.
A - even more strange, it just intensifies paradox about brightness in the very beginning and lack of breakage.

The OA is C

You are exactly correct challenger. Nice job!

David