Microtubules and Microfilaments Are Said to Be "Dynamic" Elements of the Cytoskeleton

Multiple Choice

Microtubules and microfilaments are said to be "dynamic" elements of the cytoskeleton. In this case, "dynamic" means that:

A) once individual microfilaments and microtubules have formed, they can change shape and move around inside the cell.
B) they are constantly changing and are never in the same place for very long.
C) microtubules and microfilaments are assembled and disassembled and then reassembled again in a regulated manner.