A Hatmaker, Fresh Off a Very Successful Showing at Lidzapalooza

A hatmaker, fresh off a very successful showing at Lidzapalooza is excited about the prospects of providing the finest chapeaus to meet the needs of his energized customer base in the coming year. He and his space designer have identified seven activities that are necessary to expand his small shop. For the sake of simplicity, and to avoid giving away any trade secrets, the activities have been identified by letters A-G. The activities, their time estimates, and the precedence requirements are listed in the table immediately below. Use this scenario to answer the following question(s) .
$$\begin{array} { | c | c | c | } \hline \text { Activity } & \text { Predecessors } & \text { Time (weeks) } \\\hline \text { A } & - & 7 \\\hline \text { B } & \text { A } & 6 \\\hline \text { C } & \text { A } & 10 \\\hline \text { D } & \text { C } & 12 \\\hline \text { E } & \text { B, C } & 5 \\\hline \text { F } & \text { D, E } & 11 \\\hline \text { G } & \text { F } & 8 \\\hline\end{array}$$
-Refer to the scenario above. Which of these statements is BEST?

A) Only four of these activities have zero slack.
B) The late finish of D minus the latest finish of C is less than the slack of B.
C) B's latest start plus its slack equals F's latest finish.
D) The sum of the latest start times for activities A through E is less than the sum of the latest start times for F and G.