For on call employees, which of the following is not a key factor the court will consider when determining whether or not the "on call" time is compensable?

Group of answer choices

A) All of the other responses are key factors.

B) The employee must remain on the employer's premises.

C) The frequency of the calls.

D) The employer requirement of a specific response time (i.e., the employee is required to respond in 30 minutes)

E) The employee's ability to engage in his or her own personal activities during the on call time.