The Microtubules in a Cell Form a Structural Framework That

The microtubules in a cell form a structural framework that can have all the following functions except which one?

A) holding internal organelles such as the Golgi apparatus in particular positions in the cell
B) creating long, thin cytoplasmic extensions that protrude from one side of the cell
C) strengthening the plasma membrane
D) moving materials from one place to another inside a cell