What is alzheimer's disease?
a. a group of defects that occur as a result of the mother ingesting alcohol during pregnancy
b. disorder that rapidly kills brain cells and causes dementia
c. fear of being away from the primary caregiver
d. when a child believes that nothing exists outside him/herself, and she/he is incapable of understanding someone else's position.

Hiv is inactivated in the laboratory after a few minutes of sitting at room temperature, but the flu virus is still active after sitting for several hours. what are the practical consequences of these findings? a) hiv can be transmitted more easily from person to person than the flu virusb) the flu virus can be transmitted more easily from person to person than hivc) this property of hiv makes it more likely to be a pandemic than the flu virusd) disinfecting surfaces is more important to reduce the spread of hiv than the flu