[求助]gwd10-20

lcyalexa

For why C is wrong.
* "And" doesn't make sense as a connector; it fails to convey the relationship between "being overcome by pollution" and "falling out of the sky".
* "That reduced" doesn't work, for two different reasons.
First, it's in the same timeframe as the rest of the sentence, illogically suggesting simultaneity. (To use the same past tense for things that are not sequential or simultaneous, you'd ordinarily use additional time markers, e.g., In 1955 Harry met Linda, who later became his wife. Without "later", the impression is that the two met and got married almost instantly.)
Second, a plan doesn't reduce emissions. You can make a plan to reduce emissions, but the actual reduction comes from the actions outlined in the plan. Not from the plan itself.

LMS0617

Mark一下！