Use This Scenario for the Following Question(s) -Refer to the Scenario Above

Use this scenario for the following question(s) .
The process design team at a manufacturer has broken an assembly process into eight basic steps, each with a required time, and predecessor as shown in the table. There are 8 productive hours available in a day and the manufacturer wishes to produce 400 units. Use this information to answer the following question(s) .
$$\begin{array} { | c | c | c | } \hline \text { Task } & \text { Time } ( \mathrm { sec } ) & \text { Predecessor } \\\hline \mathrm { J } & 45 & \cdots \\\hline \text { K } & 50 & \mathrm {~J} \\\hline \mathrm { L } & 40 & \mathrm {~J} \\\hline \mathrm { M } & 55 & \mathrm {~K} , \mathrm {~L} \\\hline \mathrm { N } & 40 & \mathrm { M } \\\hline \mathrm { O } & 65 & \mathrm { M } \\\hline \text { P } & 25 & \mathrm {~N} \\\hline \text { R } & 35 & \mathrm { O } , \mathrm { P } \\\hline\end{array}$$
-Refer to the scenario above. The manager assigns tasks to workstations and breaks ties using a longest operation heuristic. That is, if two or three tasks could be assigned to a given station, the manager assigns the longest task first and then fills in the remaining time at the workstation as completely as possible. Using this approach, what task(s) would be assigned at the fourth station?

A) N, P
B) M
C) N, O
D) O, P