Answer:
B. consider whether he ought to go back to find more evidence
C. think about whether he needs to change his perspective
Explanation:
When making research and the researcher discovers that his initial ideas support a different perspective, he should consider whether he needs to go back and get more evidence and whether he needs to change his perspective, so that the ideas would match the perspective.
This seems like more of a personal thing, i can give you some guidance: let's say you believe strongly in a specific political or philosophical view point. when someone breaks this viewpoint how does that make you feel? hope that helps
The last one is correct. You only capitalize P in president if it's before the president's name! :)
By finding a common interest that both of those people would have whether it is music, Political views, culture or religion etc;
