What would be an appropriate posting on an ACE certified Personal Trainer's professional social media homepage?

What would be an appropriate posting on an ACE certified Personal Trainer’s professional social media homepage?

What would be an appropriate posting on an ACE certified Personal Trainer’s professional social media homepage?
A . "Check out this new research article about five-finger shoes."
B . ”Try out this great diet supplement to lose a quick five pounds."
C . "Congrats to my client Mary who finally lost those last 10 pounds!"
D . "Job hunting ready to move on Please contact me with any opportunities."

Answer: D