Answer:
A. Let's have lunch at 1:30 p.m.
Explanation:
This sentence is the one that offers a better context to understand the meaning of the word "lunch", in case we did not know it, because it indicates a distinctive trait of this meal: It is eaten around midday (1:30 p.m), and the general definition of "lunch" is a light meal usually eaten around midday.
Options B and C are incorrect because they do not provide enough information to infer the word meaning, and option D is also wrong because "an apple, a sandwich, and chips" can be snacks, or evening meals, not necessarily a lunch.
