Should citations should have the abbreviation ?

I dont think so. If ur citing from a book, newspaper everything should be written the same as what the book says. Hope it helps :)

The answer is c)  it has no vowels

Your account is deleted, so i guess there's no point in answering. also the question was in the wrong subject. just an fyi: you can bold by using control+b. italicize by using control+i. and underline by using control+u.