Which two sources would be considered credible and useful in supporting the claim identified in the previous question?

Responses
A an interview with several principals about cheating incidentsan interview with several principals about cheating incidents
B a student's blog post on using ipadsa student's blog post on using ipads
C an article on the rise of cheating from Forbes magazinean article on the rise of cheating from Forbes magazine
D the instruction manual on how to use a cell phonethe instruction manual on how to use a cell phone
E a story heard in the hall about some kids who were cheating

C - an article on the rise of cheating from Forbes magazine and A - an interview with several principals about cheating incidents