Answer: It unnecessarily restates the editorials claim
Explanation:
Point 4 is basically point three and one simplified.
Intrinsic motivation is a motivation "from inside", with internal, rather than external awards.
Three of the things you mentioned have an external reward: the 500 Dollar prize( first option), the credit (third) and the hope of winning a blue ribbon (the last).
Only the second one has an intrinsic motivation: that you will be happy about performing this song (feeling proud of yourself, etc).
It’s gotta be B, the other answers make sense while that one doesn’t at all...
The thesis statement in the essay presents the aithor`s controlling idea.
