Answer:
Option B is correct that is Plant A.
Explanation:
We have bee give the graph of Cost of producing radios and
number of radios produce.
Where, x axis represents the Number of radios produced.
And y-axis represents the cost of producing Radios.
From the graph we ca clearly see the purple line showing the lowest cost for producing 25 Radios.
Purple line shown by Plant A.
Therefore, Option B is correct that is Plant A.