In the Table Above,how Much Does the Third Unit of Total

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


In the table above,how much does the third unit of labor ADD to total output?

A) 100
B) 125
C) 150
D) 300
E) none of the above