A complex project will fit best in what type of organization?

Thanks for the invite. 

It is C - Matrix. 

Your another option D also comes under Matrix organization only. 

c-matrix is the best  option in my opinion -thanks for the invitation

The best choice is C:

When the project is complex, it needs to draw resources from several units and accordingly, a matrix organization would be in advantageous position to execute the job.

c. Matrix

A matrix organization is best for complex projects because of the mix of functional expertise and project management focus.

Option-C..............................................................................

A matrix organization is best for complex projects because of the mix of functional expertise and project management focus.