The task was difficult, but their _____ expression let us know that they would not give up easily. [ ]

A. reliable

B. determined

C. concerned

D. grateful

Woman: I’ve changed my mind and would like to take the new approach.

Man: You’re on the right track now!

Question: What does the man mean().

A. The woman is right.

B. The woman is getting on well.

C. The woman is doing the right thing.

D. The woman has changed her mind.