Current Attempt in Progress

Propose an efficient synthesis for the following transformation:

I ne transtormation above can be pertormed with some reagent or combination of the reagents listed below. Give the necessary reagent$($s$)$ in the correct order, as a string of letters $($wisthout spaces or punctuation, such as "EBF"$).$ If there is more than one correct solution, provide just one answer.

$\backslash$table$[[$A$,$B$,$C$],[1)RC{O}_{3}H,KMn{O}_4,RC{O}_{3}H$