Identify product D in the following sequence:
A. `CH_(3)underset(CH_(3))underset(|)overset(CH_(3))overset(|)C(CH_(2)C)-=N`
B. `CH_(3)underset(CH_(3))underset(|)overset(CH_(3))overset(|)C(CH_(2)CH_(2)N(CH_(3))_(2)`
C. `CH_(3)underset(CH_(3))underset(|)overset(CH_(3))overset(|)C(CH_(2)N(CH_(3))_(2)`
D. `CH_(3)underset(CH_(3))underset(|)overset(CH_(3))overset(|)C(CH_(2))underset(OH)underset(|)CHN(CH_(3))_(2)`