Q$12-$ A project is characterized by the following activities, duration, and precedence constraints:

$$ A $(5$ weeks$),$ no predecessors

$$ B $(2$ weeks$),$ A

$$ C $(4$ weeks$),$ B

$$ D $(1$ weeks$),$ C & F

$$ E $(3$ weeks$),$ A

$$ F $(3$ weeks$),$ E

Which activities are on the critical path?

A$)$ A$,$ B$,$ C$,$ D

B$)$ A$,$ B$,$ C$,$ D$,$ E$,$ F

C$)$ A$,$ E$,$ F$,$ D