If sides $\overline{A B}$ and $\overline{D C}$ of quadrilateral $A B C D$ are parallel, which additional information would be sufficient to prove that quadrilateral $A B C D$ is a parallelogram?
$\mathbf{A} \overline{A B} \cong \overline{A C}$
$\mathbf{C} \overline{A C} \cong \overline{B D}$
$\mathbf{B} \overline{A B} \cong \overline{D C}$
$\mathbf{D} \overline{A D} \cong \overline{B C}$