Answer:
Happily
Explanation:
It describes how something is happening. He is not just thinking, he is happily thinking.
The banker had negative feelings towards the jurist. In the story, the jurist did him some not so good things. We would expect that the wager was done out of hatred for the jurist. The banker wanted to take revenge aginst the jurist.
Adverb phrase is 'performance played'
modified:Their
