`CH_(3)-overset(O)overset("||")C-OCMe_(3)overset(H_(2)overset18O)underset(H_(2)SO_(4))rarr" Products":`
A. `CH_(3)-overset(18)overset(O)overset("||")C-OH+Me_(3)C-OH`
B. `CH_(3)-overset(O)overset("||")C-OH+Me_(3)C-overset(18)OH`
C. `CH_(3)-overset(O)overset("||")C-overset(18)OH+Me_(3)C-OH`
D. `CH_(3)-overset(O)overset("||")C-OH+Me_(3)C-OH`
