Which of the Following Is a Proven Principle for Assigning

Which of the following is a proven principle for assigning work effectively?

A) Consider the availability of the employee's time and whether this is the ideal person to do the job.
B) Use the correct language for the employee's training level.
C) Be considerate but never apologetic when asking someone to do a job.
D) Give people the opportunity to ask questions and express opinions.
E) All of these