Which testing strategy should you recommend to the all the elements?

LenoxSoft wants to test all elements of their email, including variable tags, link clicks, and how the email looks on all email.

Which testing strategy should you recommend to the all the elements?
A . Useindividual email test
B . Use multivariate test & Review email preview
C . Use rendering test and send to Test List
D . Use A/B test

Answer: C