Use the Table Below to Answer the Following Questions

Multiple Choice

Use the table below to answer the following questions.
Table 17.2.2
Wendy owns an apple orchard and she employs students to pick the apples.In an hour they can pick the following amounts:
-Refer to Table 17.2.2.If the price of apples is $0.50 per kilogram,the value of marginal product of the 5th student is

A) $0.50 an hour.
B) $72.50 an hour.
C) $14.50 an hour.
D) $12.50 an hour.
E) $10 an hour.