# Pollution is a problem wherever there are people who are indifferent to their environment, and nature's balance is ha...

Ryan-Mahabir on December 15, 2019

Why is A correct? Why is D incorrect?

Thanks

BenMingov on December 17, 2019

Hi Ryan, thanks for the question.

We need to parallel the conditional reasoning in this short passage. The conditional diagrams in this passage look like this:

Premise 1: People who are indifferent to their environment - > pollution is a problem (A - > B)

Premise 2: Pollution - > Nature's balance is harmed (B - > C)

Conclusion: People who are indifferent to their environment - > Nature's balance is harmed (A - > C)

Now let's find the answer choice which parallels this reasoning.

Answer choice A does the exact same:

A - > B and B - > C, therefore, A - > C

Answer choice D on the other hand does the following:

A - > B and B - > C, but then it incorrectly (and most importantly, differently) concludes the following, therefore C - > A. It reverses the conditional diagram.

I hope this helps. Please let me know if you have any other questions.