Answer the following question given this paragraph: 

Figure 42.5 In response to a cut, mast cells secrete histamines that cause nearby capillaries to dilate. Neutrophils and monocytes leave the capillaries. Monocytes mature into macrophages. Neutrophils, dendritic cells and macrophages release chemicals to stimulate the inflammatory response. Neutrophils and macrophages also consume invading bacteria by phagocytosis.


Q: In response to a cut, mast cells secrete histamines that cause nearby capillaries to do what?

 Choices:

- harden

- narrow

- constrict

- dilate

A:
dilate
