Propose an efficient synthesis for the following transformation:

The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent$($s$)$ in the correct order, as a string of letters $($without spaces or punctuation, such as "EBF"$).$ If there is more than one correct solution, provide just one answer.

A

$t-$BuOK

E

$H_2,$ Lindlar's cat.

I

$LiAl{H}_4$; $2)H_3{O}^{+}$

B

$HBr,\frac{R}{O}OR$

F

MeMgBr;$2$

J

DMP or PCC

c

$N{a}_{2}C{r}_2{O}_7,H_{2}S{O}_4,H_{2}O$

G

TsCl$,$ py

K

conc. $H_{2}S{O}_4,$ heat

D

$HBr$

dilute $H_{2}S{O}_4$

$B{H}_3*THF$; $2)H_2{O}_2,$NaOH