Which of the following defines empirical methods?
a. activity that can be observed.
b. gathering evidence through observation and experimentation.
c. something that is changed or modified to meet new conditions or needs.
d. the scientific study of the mind and behavior.

The effect of alcohol varies from one person to another, mostly because it depends on the blood alcohol concentration, or bac. what does blood alcohol concentration not depend on? a. amount of food in the stomach b. gender and size of the drinker c. rate of consumption d. time of drinking