The answer is C for both because they follow the correct syntax and conventions of english to allow the reader to effectively read the sentence without confusion.
You should give credit to them, yes. You can state the source from which it came from, or the author himself. I’m going to say this is true
1 quart is 4 cups so 240 divided by 4 is 60 so Kat would need 60 quart containers.
30. Half of 10 is 5 and half of 30 is 15
