If David needs to reschedule with Jenny because of the emergency message with his boss, he should use the communication method of Calling.
Why should David Call?
Calling would be best for several reasons with one of them being that it would take the least time to convey the message. With calling, David can quickly inform Jenny of his predicament and get a response.
Calling is also more respectful because it shows that David considers his meeting with Jenny important enough that he had to call to reschedule.
In conclusion, he should call.
Find out more on communication methods at https://brainly.com/question/24489376.
