PLS HELP WILL GIVE BRAINLIEST AND MORE POINTS TYTY <3

Which of these choices show a pair of equivalent expressions?

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

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4