Propose an efficient synthesis for the following transformation: The transformation above can be performed with some regent or combination of the reagents listed below. Give the necessa reagents in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one c solution, provide just one answer. A. MCPBA(RCO3H) B. 1) C. 1) 2) H3O+workup 2) H3O+workup D. Mg E. 1) BH3THF;2)H2O2,NaOH F. DMP or PCC G. SOCl2, py H. 1) PhMgBr; 2) H3O+ I. Na2Cr2O7,H2SO4,H2O