On completing both the course in experimental design and the developmental psychology course, Angela will have earned a degree in psychology. Since experimental design, which must be completed before taking developmental psychology, will not be offered until next term, it will be at least two terms before Angela gets her psychology degree

(A) The developmental psychology course Angela needs to take requires two terms to complete.
(B) The course in experimental design is an easier course than the course in developmental psychology.
(C) There are no prerequisites for the course in experimental design.
(D) Anyone who earns a degree in psychology from the university Angela attends will have completed the course in experimental design.
(E) Once Angela completes the developmental psychology course, she will have earned a degree in psychology.


D,E are close, so explain why if choosing one over other.

Answer is d. The question says One has to complete ED and DP to get Psycho degree. Therefore, anyone who has got the degree must have completed ED.

Completing ED and DP does not mean Degree in Psycho. There can be other exams to clear before getting the degree.

Hope I'm clear.

D is absolutely wrong. It's a pretty big leap going from requirements specific for Angela to requirements for everyone at the university. Just because Angela needs to complete both courses to get the degree does not mean it has to be the same for everyone else.

Either the original poster mistranscribed the problem or else mistranscribed the OA. This is an inference question requiring skill in formal logic (for that reason, it is unlikely that you would get a question like this on the GMAT).

The first sentence of the passage reads:

"On completing both the course in experimental design and the developmental psychology course, Angela will have earned a degree in psychology."

This yields the following conditoinal statement:

If she completes ED AND DP, then she will have earned her psych degree.

The second sentence tells us that ED MUST be completed before DP. Therefore:

If someone has completed DP, then they have also completed ED.

Therefore, if she completes DP, then it is sufficient to conclude that she has also completed ED. And if she completes both DP and ED, then it is sufficient to conclude that she will have earned her psych degree.

Accordingly, Choice E MUST be correct.

Choice D must be wrong. It improperly reverses the initial conditional statement (without negating).

That is, in the first conditional statement, her having earned a psych degree is a conclusion or necessary condition. Choice D is trying to use her having earned a psych degree as a trigger or sufficient condition.

For example, if you are a dog, then you are definitely a mammal. Does that mean that if you are a mammal, you are definitely a dog? That is what choice D is doing.

Folks, GMAT does NOT test these formal logic subtleties.