Which of the following combination of reagents can bring the given transformation ?
A. Mg/ether, `PhCHO.//Delta, (CH_(2)OH)_(2)//H^(+),H_(3)O^(+)`
B. `(CH_(2)OH)_(2).//H^(+),PhCHO.//Delta,H_(3)O^(+)`
C. `alc. KOH,PhCHO.//Delta, Mg//"ether",H_(3)O^(+)`
D. `(CH_(2)OH)_(2)//H^(+),Mg//"ether",PhCHO.//Detla, H_(3)^(+)O`
