In the Table Above,what Is the Average Product of Four

$\begin{array}{c}\begin{array}{c}\text {Units of}\\\text {Labor}\\\hline1 \\2 \\3 \\4 \\5 \\\end{array}\begin{array}{c}\text { Total }\\\text { Product }\\\hline ---\\---\\300\\---\\290\\\end{array}\begin{array}{c}\text {Average}\\\text {Product}\\\hline---\\125\\---\\---\\---\\\end{array}\begin{array}{c}\text {Marginal}\\ \text {Product}\\\hline100\\---\\---\\20\\---\\\end{array}\end{array}$


In the table above,what is the average product of four units of labor?

A) 20
B) 60
C) 80
D) 100
E) 350