Refer to the exhibit to answer the question.

Which of the following is TRUE about the sequence diagram in the Exhibit?

A.
[available] time := getTime() illustrates the use of a condition.

B.
*[for all courses] illustrates the use of multiple concurrent conditions.

C.
Whenever one of the reportError messages is executed, the system reports an error and then
continues to add() any other courses
requested.

D.
[qualified] and [not qualified] together illustrate how to describe concurrent processing in an
interaction diagram.