Answer:
D: The use of solar energy is especially limited in areas that do not get regular sunlight.
Step-by-step explanation:
The statement in optinon D introduces a new counterclaim to the author's position. The author expresses several advantages of the use of solar energy, and all the potential it has to be developed. Also, there is a counterclaim in the statement 9, whose solution might be in 10. But there is a new challenge in the counterclaim that mentions a limit in certain areas.