Teach, that’s all I could come up with
Answer: whether, weather
Explanation: Looking at the Grey sky, Becky wondered WHETHER the WEATHER would ruin the class trip.
Weather and whether although having a similar pronunciation do not perform same function in a sentence.
Weather is used to describe the temperature and precipitation activity at a certain point in time while WHETHER is a word used as a condition between two likely outcomes.
I will help you again! So, Sweetie, the answer is Logic. As anyone can bring up motivations.
Hope I helped!
Even though you didn't give us the fragment with the comma slice, it isn't really necessary here as we can answer just based on these 4 options here. All options apart from the second one are correct - only the second option doesn't fix the mistake of the comma splice, whereas the other options do but connecting the sentences properly.
The answer would be the last one, leave it as is. B and C change the meaning of the sentence entirely, while A sounds unnatural and is too verbose.
Hope this helps! :)