Which of the following would increase resistance to blood flow?

A) A decrease in the length of the vessel
B) A decrease in the number of red blood cells
C) A decrease in blood viscosity
D) A decrease in the radius of the vessel
E) A decreased hematocrit

Blood Viscosity

The thickness and stickiness of blood, a critical factor that affects blood flow and blood pressure.

Hematocrit

The ratio of the volume of red blood cells to the total volume of blood, measured as a percentage.

Resistance

The opposition to the flow of electric current, or in a biological context, the ability of organisms to withstand disease, toxins, or unfavorable conditions.