  {}From Class I decays : $B^o \ra \pi^+ ( \rho^+ ) + D^- ( {D^*}^- )$, we
determine $a_1$, and from Class III decays : $B^+ \ra \pi^+ ( \rho^+ ) +
\ol{D}^o ( {\ol{D}^*}^o )$, we determine an allowed domain in the $( a_1, a_2
)$ plane. We find that within one standard deviation errors, the allowed band
of $a_1$ from Class I decays is at least three standard deviations removed from
the allowed domain $( a_1, a_2 )$ from Class III decays.If we expand the
experimental errors to two standard deviations we do find a small intersection
between the $a_1$ band and the allowed $( a_1, a_2 )$ domain. The results
usually quoted in the literature lie in this intersection. We suggest : (1) an
independent measurement of the branching ratio for the Class III decay, $B^+
\ra \rho^+ \ol{D}^o $, (2) a high-statistics measurement of the branching ratio
of the Class I decay, $B \ra \ol{D} ( \ol{D}^* ) + D_s ( D_s^* )$ in both
charged states, and (3) a measurement of the longitudinal polarization fraction
in the Class III decay $B^+ \ra \rho^+ {\ol{D}^*}^o $ to shed more light on the
questions involved .
