Hemorrhagic and nonhemorrhagic fever diseases have a common feature of a high fever. These categories of diseases are distinguished by _______.

A) the pattern of the fever, whether it is constant or varies with time
B) viral causes in hemorrhagic fevers and bacterial or protozoan causes in nonhemorrhagic fevers
C) the viral load in the blood, specifically the viral titer
D) the integrity of the capillary endothelium and its ability to contain the blood
E) the overall mortality rate, as hemorrhagic fevers have a much higher mortality rate