I believe its B. Stratified because the owner had to speak to ten individuals, meaning he divided it into smaller groups.
4/10^2 = 0.04
which is equal to:
4x10^-2
As there are two digits behind the decimal point up to( and including the 4) thus the 10^-2
And as the digit is a 4 you multiply 10^-2 by 4
16 ounces in a pound.
120/16 = 60/8 = 30/4 = 15/2 = 7.5
7.5 lbs = 120 oz
7.5 lbs > 7 lbs
