I think it's B. I hope that helped..
Answer:
Beneath is worried about Mama's meeting with Mr. Asagai because Joseph Asagai is a Nigerian student with progressive ideas. Beneatha is impressed with Asagai and doesn't want her mother to embarrass her in front of him.
Explanation:
The grocer didn't notice the thieves enter until it was too late.
If you were playing the piano how did the vase get broken.
The police force still had no idea how they were going to enter the strange cottage without being seen.