Which among the following compounds will give maximum enol content in solution?
A. `C_(6)H_(5)-overset(O)overset(||)C-CH_(2)-overset(O)overset(||)C-C_(6)H_(5)`
B. `CH_(3)-overset(O)overset(||)C-CH_(2)-overset(O)overset(||)C-CH_(3)`
C. `CH_(3)-overset(O)overset(||)C-CH_(2)-CH_(2)-CH_(3)`
D. `CH_(3)-overset(O)overset(||)C-CH_(2)-COOC_(2)H_(5)`