Answer:
A. presiding officer of the council
Step-by-step explanation:
A. presiding officer of the council
Presiding Officers are "responsible for conduct in their polling station and must have a good knowledge of the voting procedures". So we have that one of the roles of the mayor in a council is presiding the officer of the council.
B. council-manager
That not represent a important rol for the council manager since the most important role is on this case presiding officer of the council among other important things.
C. the governor
That's not a primary role for a council manager so then that's not correct.
D. None of these
False the option A is appropiate and good for the question