GMAT Critical Reasoning (CR) | Re: In the Business program

In the Business program at a university, all candidates for the MBA in International Business who entered the program after 1990 took a seminar on Microeconomics, and all candidates fortheMBA in International Business who entered the program after 1994 took a seminar on AppliedEconomics.

If a student in the Business program described above took a seminar on Microeconomics but did not take a seminar on Applied Economics, which of the following must be true?

A. The student entered the Business