how to identify whether a sentence is more logic from SCs

[saintjingjing]

I want to identify how to understand a SC from logic,
I give an example from prep+ og( I will not edit it here but I give number )

prep (=og#77) (but there is not sufficient explanation about TWO PARTS FROM A CORRECT ANSWER AND A WRONG ANSWER)

[deleted because problem is from a banned source - see below]

I want to ask how to identify the logic meaning from
A: before they rot when warmer weather returns

E: before warmer weather returns and rots the fruit

structure :A=>before subject verb when...
B=>before subject1 verb1 and subject2 verb2

but what is the difference in meaning?

[tim]

OG is a banned source; it is illegal to post OG questions anywhere on the web. If you are in one of our classes, please ask OG questions during office hours or before/after class..

There is no need to look at logic or meaning in this one. There is only one answer that uses pronouns correctly, and that's what you should focus on..