The correct answer is "positive self-talk"
It is extremely important to value yourself because if you do not value yourself, other will not value you.
A collective fear can lead to irrational actions and violation of rights. This is the theme common with The Crucible and the World War II. An example is when Japanese Americans were imprisoned without enough evidences. The war has the highest number of casualties making it the deadliest among other wars.
C. Combine the sentences to condense the repetitive info. about inprovement.