i.e. does not form a part of underline stmt and hence while cannot be used - thrfore D & E are out
"while supporting" - since the action is still being performed.
It could not be A.
The right answer should be C or E. Not sure which one.
Parallelism demands either "they denounce.... support" or "they are denouncing .... are supporting".
I incline to believe it is C. In E, present continuous is not required.
D - while .... at the same time - AWKWARD
E - "it" is redundancy
C - same like E
B - who "supporting" - the people or the government?
A - correct for me