0QUESTION
END
- I helped you as I promised I would – now you have to keep your end up.
- You will exhaust yourself if you keep burning the candle till the end every day.
- The student was at her wit's end: she couldn't understand the question no matter how hard she tried.
- The lawyers were determined to see the case through to the bitter end
ANSWER
OA - 1
It should be Your end of the bargain.
Other options are fine.
"Keep your end up" doesn't mean anything.
"Keeping your end of the bargain" means to fulfill your obligations, and it's a common idiom.
