- People are against constructing an oil pipeline across the lake’s bottom because of potential leaks
- We’re told that new technology will prevent leaks from occurring.
- Conclusion: If effective, people don’t need to worry about leaks anymore.

A – This is not a necessary assumption. We’re discussing the impact of an oil pipeline, not other industrial development and its impact. Out of scope.

B – This is not a necessary assumption. We’re told that those fears are groundless IF the technology is effective. So this is already stated.

C – CORRECT. If the bottom of the lake does contain toxic remnants, then those fears are certainly not groundless.

D – Not necessary. The leak can harm other things as well.

E – Irrelevant.