单选题I just received a proposal（）A that you have finalized the delivery dates.B to be more flexible over terms of payment.C that is made with certain conditions.D that could benefit both of us.
题目
单选题
I just received a proposal（）
A
that you have finalized the delivery dates.
B
to be more flexible over terms of payment.
C
that is made with certain conditions.
D
that could benefit both of us.