The answer is D. Because the publication field specifies that <span>in which publication (magazine, book, and so on) the source can be found.
EDSeek or the Expanded Academic ASAP is a way of citation of different sources.</span>
I would say that the use of Carpe diem in England during the Renaissance demonstrates the incorporation of Latin into English.
Renaissance was the time when ancient languages became very important, and as you may already know, even today's English is full of Latin words and expressions, such as carpe diem and others.
I think he may be right. But I have not read the whole thing, so I may be wrong.