Out of all given options, āProcessed foods are usually less expensive to purchase, and they are easier to makeā is an example for a compound sentence.
Answer: Option C
Explanation:
A sentence is said to be compound when it has more than two subjects. A subject is something which performs an action. Here in this sentence, processed foods is the subject. They perform an action i.e., being less expensive.
They are two clauses (processed foods and being less expensive) but they have distinct values. A compound sentence usually joined with a conjunction or by a comma to ensure a smooth flow of ideas by combining both sentences.