答案:C
$\because AB//AD$,
$\because AB//AD$,
$\therefore \angle ADB = \angle DBC$。
$\because ADCB$ 為圓上的點,
$\therefore \angle ADB = \angle ACB$。
在 $\Delta BCE$ 中,
$\begin{array}{rcl}
\angle EBC + \angle ECB & = & 74^\circ \\
\angle EBC & = & 37^\circ
\end{array}$
$\therefore \angle ADB = \angle ACB = \angle EBC = 37^\circ$。
在 $\Delta ABD$ 中,
$\because AB = AD$,
$\therefore \angle ABD = \angle ADB = 37^\circ$。
在 $\Delta ABC$ 中,
$\begin{array}{rcl}
\angle BAE & = & 180^\circ – 37^\circ – 37^\circ – 37^\circ \\
& = & 69^\circ
\end{array}$