If you could please help good sir...

Find the greatest common factor of 28 and 35

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

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.