Which is the BEST explanation for why it is important to maintain a positive attitude when you are working on your health, even when you hit bumps in the road?
A.
You should have a positive attitude only if you are doing well.
B.
Having a positive attitude is not really important, but it is a good idea.
C.
Beating yourself up about it will actually slow your fitness goals even more.
D.
A positive attitude is important, but a negative attitude can be motivational as well.