Which correction should be made to sentence 20?

— ExhibitC

Sentence 20:If we continue to receive complaints regarding inappropriate workstation behavior, management, will have to find a better means of controlling the situation.

Which correction should be made to sentence 20?.
A . insert a comma after complaints
B . remove the comma after behavior
C . remove the comma after management
D . change will have to could have
E . change of controlling to to controlling

Answer: C