A City Ordinance Requires That More Than 75% of Its $\mu$

A city ordinance requires that more than 75% of its residents must agree to the construction of new public buildings (using tax dollars) before any such structures can be built. A proposal has been made to build a new recreational facility in the city, and sponsors of the proposal want to conduct a small survey to see if it would be approved if put to an official vote of all residents. A simple random sample of 150 residents revealed that 123 supported a change (and 27 did not) .
What are the null and alternative hypotheses in this situation?

A) H₀: $\mu$ = 112.5 H_a: $\mu$ > 112.5
B) H₀: $\mu$ = 112.5 H_a: $\mu$$\neq$ 112.5
C) H₀: p = 0.75 H_a: p > 0.75
D) H₀: p = 0.75 H_a: p $\neq$ 0.75