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 necessary reagents 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. MCPBA (RCO3H) B.1) H3O+workup c. 1) 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