Choose A, B, C or D as the best answer. 30. The author’s main argument is that __________.

Question

BlackTom AI · Accepted Answer

There are alternatives to the way urban housing is conventionally achieved. This statement captures the author’s central claim, because the passage consistently presents non‑standard models, examples, and solutions as viable substitutes for typical market‑driven housing.

1) Relevant knowledge points and concepts
- Main idea (thesis) vs. supporting details: the thesis is the author’s primary assertion; supporting paragraphs supply evidence, examples, or consequences. 
- Signals of a main argument: repeated emphasis, framing at the start or end, and selection of evidence directed at proving a single broader point (not just a fact).
- Contrast between claims (broad thesis) and narrow factual statements (specific cities, profitability, or historical success).

2) Step‑by‑step reasoning
- Step 1: Identify the thesis sentence or recurring theme. The passage repeatedly highlights alternative housing approaches (collectives, medium‑density prototypes, community‑led developments) and uses them as solutions to conventional shortcomings.
- Step 2: Examine supporting evidence. Examples are given to show different models, how they operate, and why they work—this supports a claim that alternatives exist and are practical.
- Step 3: Compare each option to the thesis. Option (a) states the broad claim that alternatives exist; options (b), (c), and (d) are narrower and either factual or evaluative claims that the passage does not centrally assert.

3) Intermediate reasoning steps shown
- If the author’s paragraphs emphasize new models and their implementation, the natural conclusion is endorsement that alternatives are available.
- If specific references to Melbourne or profitability are only illustrative, they are supporting details rather than the main point.

4) Why the correct answer is correct
- Option (a) generalizes the passage’s thrust: proposing and validating alternatives to conventional urban housing. The supporting material serves to prove that point.

5) Why other options are incorrect
- (b) is too specific; the author does not primarily argue Melbourne’s leadership. 
- (c) reframes the argument as about profitability and sustainability, which is narrower than the existence of alternatives. 
- (d) contradicts the evidence if the passage highlights functioning housing collectives; it claims they have not been successful.

Conclusion: The best answer is (a). This matches the provided correct answer.

Choose A, B, C or D as the best answer. 30. The author’s main argument is that __________.单项选择题

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