A student claims that the following machine does not represent a function machine because it accepts two inputs at once rather than a single input. How $d$ you respond?

Choose the correct answer below.

A$.$ The student is correct. The ordered pair input could result in the same output for different values of $x$ and $y$ and therefore this is not a function.

B$.$ The student is correct. A function machine cannot accept multiple inputs at once.

C$.$ The student is incorrect. A function machine can accept multiple inputs at once.

D$.$ The student is incorrect. The ordered pair $(x,y)$ is considered a single input.