Correct Option (B)
Assumption 2 is correct. The passage explicitly states that it is "easy to overlook the relations between science and mankind, and to treat the former as some abstract third party." It further asserts that "Science and mankind cannot be divorced from time to time at men’s convenience." This directly supports the idea that the overlooked aspect of truth is the intrinsic connection between science and human agency, implying that science is fundamentally a product of human actions and choices.
Incorrect Options:
Assumption 1 is incorrect. The passage poses a question: "Is this the inevitable result of the progress of science or does the fault lie elsewhere?" This indicates that the author is challenging the premise that the horrors of modern life are an inevitable outcome of scientific progress, rather than affirming it. The author suggests that blaming science is a "convenient" but potentially misdirected attribution of fault.
Option (A) is incorrect because Assumption 1 is not supported by the passage.
Option (C) is incorrect as Assumption 1 is invalid, meaning both assumptions cannot be correct.
Option (D) is incorrect because Assumption 2 is valid and directly inferable from the passage.