My 2 cents from what I understood:
Which can be an inference/ can be deduced from the argument- The answer is A.
(A) It is possible that the Electoral College would be replaced by a different institution - best answer choice as it can be inferred because firstly it says "it is possible" meaning there is a chance of EC being replaced and also the argument is favoring this position as a maybe.
(B) The Electoral College is non-democratic - cannot be inferred as it is mentioned that some people find it undemocratic in a modern sense so nowhere the indication of EC being non democratic is there.
(C) The Electoral College will be soon replaced by a more popular, accepted form of democracy - cannot be inferred as only some people find the concept of Electoral College old and there is no surety that it will get replaced as per the argument.
(D) Through Electoral College, one can directly vote for a presidential candidate - cannot be inferred as it is clearly mentioned in the argument that through this method one elects the electors who then chose the president. So wrong choice.
(E) The people’s choice for presidential candidate generally differs from the electors’ choice - cannot be inferred as there is no indication of this possibility in the argument + no surety of this happening + presidential candidate can be the same too for both people and electors so 'generally' is a wrong choice of word here (50-50 chance).
Posted from my mobile device