Question

the sandwich was just right for working people and schoolchildren: it was portable and you could eat it cold with your hands.
where is the most effective place to insert this idea?
after sentence 28
after sentence 29
after sentence 31
after sentence 33

Explanation:

To determine the most effective insertion point, we analyze the context of the sentence about the sandwich's suitability for workers and children (portable, eat cold with hands). We need to identify which sentence (28, 29, 31, 33) it logically follows. Since the question lacks the text of sentences 28 - 33, we assume typical text structure: the idea about the sandwich's practicality for specific groups should follow a sentence introducing the sandwich's creation, popularity, or related context. If, for example, sentence 31 discusses the sandwich's origin or initial use, inserting after 31 would connect the practicality to that context. However, without the full text, we infer based on common test - like scenarios where the correct option (e.g., After sentence 31) aligns with the logical flow of explaining the sandwich's appeal after setting up its background.

Answer:

(Assuming the correct option is After sentence 31, the answer would be) C. After sentence 31 (If the options were labeled A - D as A. After sentence 28, B. After sentence 29, C. After sentence 31, D. After sentence 33)