Which of the following would be a plausible smart goal for a person who is new to exercise?

Arowing five miles solo in 2 hours by the end of the day

Brunning a fifteen-mile course in 45 minutes by the end of the week

Cswimming twenty 50-meter laps in 30 minutes by the end of two week

Dwalking one continuous mile in 25 minutes by the end of the month