should definitely be "for" rather than "with." Consult your drop-down menu!!!
I put "I am very happy for your success." "For" was one of the three listed on the drop-down. The answer said it was "I am very happy WITH your success." "With" was NOT one of the three listed on the drop-down!!!!!
You cannot rely on drop down even if you use the first word. Apparently they are hints that could lead to other words.