About distillation methods

Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation. Dry distillation is the heating of solid materials to produce gaseous products

Explanation:

Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation. Dry distillation is the heating of solid materials to produce gaseous products.

The author clearly argues for the use of solar energy, so a counterclaim to this claim would be something that  weakens this claim.

Among the options the first 3 actually support the main claim, they strengthen  the author's position.

The correct answer is
The use of solar energy is especially limited in areas that do not get regular sunlight