did a brave thing

[azz]

a. You did a brave thing to stand up to those thugs.
b. You acted bravely to stand up to those thugs.
c. You acted bravely in standing up to those thugs.
d. You acted bravely standing up to those thugs.
e. You acted bravely, standing up to those thugs.
f. It was brave of you to stand up to those thugs.


Are all these sentences grammatically correct?
Do they mean the same?

Many thanks.