3.Decide which sentence is more concise.
A: I wish to express my heartfelt gratitude to you for your kind cooperation.
B: Thank you for your cooperation.（单选2 分）
A:A
B:B
C:A & B
D:Neither
选项：

A:
A:A;
B:
B:B;
C:
C:A & B;
D:
D:Neither