Given the Table Below,if Capital Is Fixed at One Unit,diminishing

Multiple Choice

Given the table below,if capital is fixed at one unit,diminishing returns begin with the $$\begin{array}{l}\quad\quad\quad\quad\quad \text { Units of Capital }\\\begin{array} { c c c c c } & & 1 & 2 & 3 \\ \text { Units } & 1 & 80 & 100 & 120 \\\text { of } & 2 & 180 & 220 & 260 \\\text { Labor } & 3 & 270 & 330 & 390 \\& 4 & 340 & 420 & 500 \\& 5 & 390 & 490 & 590 \\& 6 & 410 & 530 & 650\end{array}\end{array}$$ Amount of total output produced from various combinations of labor and capital.

A) first unit of labor.
B) second unit of labor.
C) third unit of labor.
D) fourth unit of labor.
E) none of the above