DISCUSSION: The right answer will have a line supporting it. If you can’t find the line, you probably don’t have the right answer.
You can quickly find lines if you know the structure of the passage. Always try to know roughly what information each paragraph has.
- The passage does mention that radiocarbon dating could predict future earthquakes, on lines 11-14. But it never says lichenometry can predict earthquakes.
- CORRECT. Paragraph 1 says radiocarbon dating is used to date samples from trenches along visible fault lines (line 3). So it’s unlikely radiocarbon dating is useful if there are no fault lines.
- The passage never said “these are the only two methods”. There could be others.
- We have no idea. We know radiocarbon dating is not good for 300 years ago (lines 45-48) and lichenometry is not useful for more than 500 years ago (line 54). But 400 years ago? We have no idea. This answer is just trying to confuse you by throwing in a random date we know nothing about.
- Lines 54-58 say we can correct for factors that change lichen growth rates. This answer contradicts the passage. Presumably, factors affecting growth rate are not a deal-breaker.
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