Which is a true statement about 10 days of production?

a. plant c is just beginning to produce actual widgets.

b. none of these plants is yet producing actual widgets.

c. plant a is the closest to producing actual widgets.

B. None of these plants is yet producing actual widgets

Explanation: since number of days is on the x axis, 10 days corresponds to 10 on the x axis. At 10, none of the lines are above 0 on the y axis yet. Since the y axis represents number of widgets, this means none of the plants have produced more than 0 widgets yet.