Let me try to explain this one.
The main passage implies that internal passports should be issued in order to restricts illegal immigrants. i.e. to make some sort of standardization for every immigrant. Now, lets try to correlate answer options.
A) Standardize the entrance examination for entrance exams.
B) Here as well standardization but does NOT make other hospitals to follow that stringently(as per the statement). This sentence has got some ambiguity.
C) Standardization of resale value for cars. But, it is not mandated also, there is no problem which they are trying to resolve.
D) Talks about standardization of lines. But, here there is no problem which they are trying to resolve.
E) Talks about standardizing for only one organization. There is nothing general here.
Hence, I picked A. Hope my reasoning is fair enough to get to the proper answer. Please comment if you have anything else to add to this.
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