Question 6 1 pts Consider the following C function with unknown types for its inputs. Both a and b have the same type. char foo(?? a, ?? b) { return a > b; } Below is the full x86-64 assembly for this function: foo: seta ret %rsi, Erdi mal Recall that return values are placed in the 'a' register. %rdi contains the first argument, and %rsi contains the second argument. What is the exact C type that replaces the ?? in the code above? O float double int O unsigned int char unsigned char long O unsigned long