please help!

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 B C D tBuOK H2.. Lindlar's cat. 1) R2BH;2)H2O2,NaOH HBr E H2SO4H2O,HgSO4 G H TsCl.py NaOH 1) LiAlH4: 2) H3O+ DMP or PCC HBr,ROOR 1) MeMgBr; 2) H3O+