Step 1: Understanding the argument.
The argument is that renewable energy is necessary for environmental friendliness and sustainability.
If current energy sources (non-renewable) are depleting, there is an urgent need for alternatives, directly strengthening the argument.
Step 2: Evaluating options.
(a) Past success — supportive, but doesn’t show urgency.
(b) Other countries’ growth — indirect benefit, not necessity.
(d) Public opinion — may help in policy adoption but doesn’t prove need.
(c) Depletion of current sources — creates strong necessity and urgency for renewable energy.
\[
{\text{The current energy sources are depleting rapidly (Option (c)}}
\]