How can students most easily find relevant periodical articles?

ASearch the Internet.
BSearch the library stacks.
CUse the electronic index.
DUse the paper card catalog. (not correct)

Verified Answer :

A. Search the Internet would be a relevant source. 

Students most easily find relevant periodical articles by searching the internet.

So, the correct answer you are looking for is, A. Search the internet

Good luck with your studies, I hope this helps!