I did this last week..... Your answer is C because it's every 5 yards, the first to 11 is 5 x 10, and then we have to find x 3 that because we have to find feet, so..... C is your answer.
Glad I could help, and good luck!
<span>The number of fully blocked experiment that the researcher will be able to form given that the groups of subjects is composed of 1 explanatory variable and 3 other variables, for a total of four variable is letter B. 16. This is because there are 2 options in each of the variable similar to saying 2^4 which is equal to 16. </span>
The answer to your question is,
A. Multiplication
-Mabel <3