Suppose you have declared a method named private static void CalculatePay$($double rate$).$ When a method calls the CalculatePay$()$ method, the calling method $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.$

a$.$ cannot contain any declared double variables

b$.$ might contain a declared double named rate

c$.$ cannot contain a declared double named rate

d$.$ must contain a declared double named rate