Gallons of Output for October and November Were 45,000 and 56,000

Multiple Choice

Gallons of output for October and November were 45,000 and 56,000, respectively. Gallons of input for October and November were 46,000 and 64,000, respectively. Which of the following statements is true?

A) The yield for October was 0.98 (rounded) .
B) The yield for November was 0.88 (rounded) .
C) The yield is deteriorating, and the cause of the loss should be investigated.
D) all of these choices