Project team building is most difficult in which kind of environment?

Project team building is most difficult in which kind of environment? 

a. Weak Matrix

b. Strong Matrix

c. Projectized

d. Functional (with the team entirely within the functional department)

Weak Matrix...

 1 chapter a day during the week after work and 2 chapters each on Saturday and Sunday.

Correct. If we remove that sentence in bracket then answer would be Functional.