Which of the following is the BEST example of a process-oriented SMART goal for a client who is new to exercise?

Which of the following is the BEST example of a process-oriented SMART goal for a client who is new to exercise?
A . Complete a marathon within a year.
B . Lose 10 lb (4.5 kg) in six weeks.
C . Perform five full push-ups within six months.
D . Work out three times per week for the next four weeks.

Answer: A