LSAT 146 | Section 4 | Reading Comprehension: Q25

RC Question 25 Explanation

DISCUSSION: This question gives no hints. This is the strategy you should use on questions with no hints:

• Don’t spend time on any of the answers until you’ve looked at all of them.
• Your goal should be to identify the 1-2 most plausible answers, quickly.
• Then, check the passage to see if you can confirm them.

The wrong answers here are designed to bog you down. Don’t fall into their trap. Choose the best order to approach them in.

Note that the wrong answers here are really tricky. That’s why you must avoid forming an opinion of them until you find the most likely one.

___________

1. This contradicts lines 11-14. Normally, ozone is created and destroyed in the stratosphere. (But in equal amounts)
2. This is something that sounds true in real life. But the passage didn’t say what the main cause of skin cancer is, so you can’t choose this answer. We’re looking for something supported by the passage.
    
   (Lines 1-2 say that UV radiation contributes to skin cancer, but it doesn’t say it’s the primary cause.)
3. Tricky. It’s possible that many chemicals could destroy ozone, but they don’t rise to the upper atmosphere. E.g. imagine gold destroyed ozone. Not exactly a threat to ozone high up in the stratosphere, is it?
4. CORRECT. This is supported. CFCs deplete ozone (see paragraph 2), and ozone protects us from UV radiation (see lines 3-6), and UV radiation causes skin cancer (see lines 1-2).
5. You might think this is true from real life, but we’re looking for something the passage says. Line 53 says there was an ozone hole was discovered over Antarctica, but the passage doesn’t say that’s the main place CFCs flowed upwards.