Question related to network diagram

SumitK

https://www.oliverlehmann.com/pmp-self-test/75-free-questions.htm

Could not understand answer to question 75 in this link? Can any one help?

Harwinder

I had explained this in Feb 2010 on my blog. See this link:

https://www.deepfriedbrainproject.com/2008/12/pmp-certification-exam-prep-study-notes.html?showComment=1265813587909#c5777123844649831543