What’s the correct answer for this question?

5× 1/2 = ? a) more than 5 because you are multiplying by a whole number b) 5/10 because you multiply the numerator and denominator by 5 c) less than 5 because you are multiplying by a number that is more than 1 d) less than 5 because you are multiplying by a number that is less than 1

Wich statement could be used to explain why the function h(x)= x^3 has an inverse relation that is also a function

How is this equation completed? i cannot find any examples in the book.