What is gothic lit? I’ll answer if ya tell me :)
Answer:
b. dolphins appear to be highly intelligent animals.
The technique that this sentence best illustrates is understatement.
Understatement means that you are not showing the full 'strength' of something, but it is rather understated - so here, the coach only said that 'he was glad' even though his team won the Super Bowl, which is a huge deal. So his emotions should have been way stronger.