The use of compensating controls involves a three-way process.

The Thunderbolt protocol _________ layer is responsible for link maintenance including hot-plug detection and data encoding to provide highly efficient data transfer.

A. cable B. application C. common transport D. physical

In the following pseudocode, which value is the accumulator?

``` Set x = 0 For m = 1 To 10 Set x = x + m End For Display x ``` a. x b. m c. x + m d. there is no accumulator