Answer the following question given this paragraph: 

Figure 4.22 Microfilaments thicken the cortex around the inner edge of a cell; like rubber bands, they resist tension. Microtubules are found in the interior of the cell where they maintain cell shape by resisting compressive forces. Intermediate filaments are found throughout the cell and hold organelles in place.


Q: What thickens the cortex around the inner edge of a cell?

 Choices:

- mitochondria

- vacuoles

- plasma membrane

- microfilaments

A:
microfilaments
