Which sentence is correct?

Question

With a feeling of selfsatisfaction, Jim answered the last twenty-five questions on his driver's examination.
With a feeling of self satisfaction, Jim answered the last twenty-five questions on his driver's examination.
With a feeling of self-satisfaction, Jim answered the last twenty-five questions on his driver's examination.

Answer 1

The correct sentence is:

With a feeling of self-satisfaction, Jim answered the last twenty-five questions on his driver's examination.

In this context, "self-satisfaction" is a compound noun and should be hyphenated.