A control chart displays _. a. Whether workers are motivated
b. Top management takes interest in quality
c. Inspectors are doing their job
d. Process variability​

answer is b my friend

The answer is: c.) a 12-pack bag of chicken at $20

In order to give all of the guests 2 pieces of the chicken, the Hendersons need to buy at least :

5guests x 2 = 10 pieces of chicken.

Now,  we just need to find which of the following options is cheaper.

Option A.

= 10 x $ 3  = $ 30

Option B

= 5 x $ 5 = $ 25

Option C

= $ 20 for all 12 pieces . . .  (the cheapest one)

Option D.

= $ 35 for all 20 pieces

 Technically if we count per pieces, option D has the lowest price per chiecken pieces. But since The Henderson only need 10 pieces, the best options for them would be Option C.