What does the balded word mean?

Question

The PORTENTOUS actor stood up to receive the award, even though his name hadn't yet been called.

A.) arrogant*************************
B.) confident
C.) excited

Answer:

1.) A

Answer 1

I don't think any of those words is correct.

http://www.google.com/webhp?source=search_app#q=portentous

Answer 2

It's on a worksheet and those are the only 3 possible choices.