The chances that tropical storms will develop in a given area increase whenever the temperature of a large body of wa...

EmilyMarieMenendez July 12, 2018

Is This Why A is Correct?

Hi, I just want to confirm my thought process for the answer choice A. Answer choice A: "There are likely to be more tropical storms if the amount of carbon dioxide in the Earth's atmosphere continues to increase." I diagramed the chain below: CDI-> EWTI-> >26D60M-> CTSI Since answer choice A includes the Sufficient introduction word "if" before "the amount of carbon dioxide," it is okay to use the chain to refer to the CDI sufficient condition to conclude that CTSI, a necessary condition. If the statements were flipped (if CTSI likely CDI) this would be invalid since you can not get information from a necessary condition. Is this correct? Thank you, Emily Menendez

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Anita July 12, 2018

Hi @EmilyMarieMenendez, it looks like you're following this correctly. We know that if carbon dioxide increases, water temperatures increase, and if they increase to 26C/60m+, then there are more tropical storms. We can reduce that chain to if there is more carbon dioxide, there will be more tropical storms, which is A.

charlierusso04 July 1, 2019

How come answer "C" cannot be correct?

Ravi July 1, 2019

@charlierusso04,

Happy to help. Let's look at (C).

(C) says, "The number of large bodies of water whose temperatures
exceed 26 degrees Celsius to a depth of about 60 meters is greater
today than it ever was."

The problem with (C) is that we don't know about the past; rather, we
only know about what's likely to happen in the future when compared to
the present day, so this is why (C) is out.

Does that make sense? Let us know if you have any other questions!