A: Did you solve _ problem you were discussing at the meeting?
B: No, we didn't. It was _ difficult problem we had never met.
A. the, the B. a, a C. the, a
A: Did you solve _ problem you were discussing at the meeting?
B: No, we didn't. It was _ difficult problem we had never met.
A. the, the B. a, a C. the, a