I think ur answer would be C.
Short Answer: B
Long Answer:
The stamen is the male fertilizing organ of a flower. The stigma is the part of pistil that receives the pollen.
What you know:
Mr. Adams spent $36.25 on 12.5 pounds.
All you do to find the cost per each pound is:
36.25/12.5
Your answer:
$2.9 dollars per pound.