In the hospital project network, which activities are the immediate predecessors of J?

• A. F and H
• B. A and B
• C. E and J
• D. G and I

Answer: (B)

Immediate predecessors are the activities that must finish before J can start. In the hospital project network, J has incoming arrows from A and B, so both A and B must be completed before J can begin. That makes A and B the immediate predecessors. The other options either point to activities not directly feeding into J or include J itself, which cannot be a predecessor.