Option A is a good conclusion for the editorial because it is hopeful and ends on a positive note. Option B would be completely counterproductive as it is a counterargument to the main point of the passage.
Option C is not correct because rhetorical questions are not accepted in editorials or other forms of formal writing. Option D does not work because it contains a basic and crudely drafted opinion along with a grammatical error.
I believe the sentence that is off-topic is Sentence 3 The gardeners also decide what types of pesticides, if any, are used on the produce in the garden hope this helps :)
