Choose reagents from the following list which will lead to an effective synthesis as shown below. List the letters for each reagent, in the correct order, with no spaces or commas between them $($for example, BD represents a two$-$step synthesis that begins with reagent $B$ and concludes with reagent D$).$

A$)B{r}_2,CC{l}_4$

B$)NaN{H}_2(1$ equiv.$)$

C$)$ excess $NaN{H}_2,$ followed by $H_{2}O$

D$)C{H}_{3}I$

E$)C{H}_{3}C{H}_2$

F$)C{H}_{3}C{H}_{2}C{H}_{2}Br$

G$)H_{2}S{O}_4$

H$)Na,N{H}_3($liq$.)$

$H_2,Pt$

J$)H_2,$ Lindlar's catalyst

K$)HBr$

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

M$)O_3,$ followed by DMS

N$)O_3,$ followed by $H_{2}O$