What does the word conviction mean in this sentence?

Question

His voice rang with great conviction as he told us his ideas.
A)Anger
B)Certainty
C)Confusion
D)Sorrow

Answer 1

Have you looked up conviction in a dictionary?

We'll be glad to check your answer.

Answer 2

http://dictionary.reference.com/browse/conviction?s=t

See definition #1. Which of those words means the same thing.

Answer 3

Yes

Answer 4

Thank you!

Answer 5

You're welcome.