C)significant

A) ignorant- An opinionated statement. This is why it is a bad choice B) accessible- It is not accessible if it is forced upon you. Does not fit. C) significant- it is hard to deny that it was a lot. This fits. D) durable- This usually describes an object or idea lasting over time. Does not quite match. E) fertile- This would be conflict that grows and spreads. Though it may work, it does not express what the writer wants to say most. Mostly the author just wants to say it was a lot of conflict.

It's definitely not A, B or E. I think the answer is C. Significant. Which means important. And I think that "conflict" should be written as "conflicts"