The question seems incomplete, the last part is:
If she gives Jane the check and then has
second thoughts about having done so, she may:
The answer is, If she gives Jane the check and then has second thoughts about having done so, she may
"ask that the contract be avoided based on undue influence".
Undue
influence is a tenet that includes one individual exploiting an advantage over
someone else. This disparity in control between the groups can vitiate one party's
assent as they can't openly practice their free will.