The Eleven Tasks Necessary to Assemble an MP3 Player Along

Multiple Choice

The eleven tasks necessary to assemble an MP3 player along with their time (in seconds) and immediate predecessor(s) is given below:
$\begin{array}{ccc}\text { Task } & \text { Time (n minutes) } & \text { Predecessor(s) } \\\text { A } & 40 & \text { none } \\\text { B } & 15 & \text { none } \\\text { C } & 35 & \text { none } \\\text { D } & 12 & \text { A, B } \\\text { E } & 27 & \text { B, C } \\\text { F } & 29 & \text { D } \\\text { G } & 60 & \text { D, E } \\\text { H } & 30 & \text { E } \\\text { I } & 14 & \text { F, G } \\\text { J } & 22 & \text { G, H } \\\text { K } & 43 & \text { I, J }\\\text { Total }&327\end{array}$ The company wants to produce 600 units in a 9-hour day.
-The minimum number of workstations required is _____.

A) 5
B) 6
C) 7
D) 8