This question examines the ability to infer the author's attitude from a passage about a trend in consumer products. - A. The author's indifference is not in line with the context of a product becoming a necessity. - B. The author's suspicion does not match the context of the product being a staple in homes. - C. The author's laughter is inappropriate for a product that has become essential. - D. The author's full support aligns with the product being a necessity, which matches the context. The correct answer is D. The author is fully supportive, as the product has become essential.