Which of the Following Statements About the Cytoskeleton Is True

Which of the following statements about the cytoskeleton is true?

A) Transport vesicles move between organelles of the endomembrane system independently from the cytoskeleton.
B) Microfilaments are structurally rigid and resist compression, whereas microtubules resist tension (stretching) .
C) Movement of cilia and flagella is the result of motor proteins causing microtubules to move relative to each other.
D) Chemicals that block the assembly of the cytoskeleton would cause little effect on the cell's response to external signals and stimuli.