—Can you help me with my homework David ?— A. No problem.B. You are welcome.C. Thank you

问题补充：

—Can you help me with my homework , David ?—

A. No problem.

B. You are welcome.

C. Thank you .

D. That’s right.

答案：

(答案→)A. No problem.

B. You are welcome.

C. Thank you .

D. That’s right.

解析：That’s all right:一般用于别人向你道歉,你说没关系。You are welcome.用于别人向你表示感谢，你回应不客气。Thank you。表示感谢。No problem.没问题。从语境来看，A最符合题意。