Which of the following activity sequencing methods describes the start-to-start dependency?

Which of the following activity sequencing methods describes the start-to-start dependency?

A.
The completion of the successor activity depends upon the beginning of the predecessor activity.

B.
The completion of the successor activity depends upon the completion of the predecessor activity.

C.
The beginning of the successor activity depends upon the completion of the predecessor activity.

D.
The beginning of the successor activity depends upon the beginning of the predecessor activity.