单选题I have a small token of our gratitude（）A that the process can be made simpler.B when we look at this question.C which is the Mark 2 project.D which I would like you to have.
题目
单选题
I have a small token of our gratitude（）
A
that the process can be made simpler.
B
when we look at this question.
C
which is the Mark 2 project.
D
which I would like you to have.