Need help with Oliver lehmann -175 question bank-Question no 59.I do not undersatnd how answer is option -1. I know this question has been discussed in this forum already but am not convinced with the ans.Please share your thought with explanation.

Q-What does this diagram tell you?
o The project can probably not be finished as scheduled.
o You may be able to finish the project early by reassigning work.
o You should avoid network logic diagramming for scheduling.
o You may run into problems with dual reporting relationships.