Which of these factors may affect a person's blood alcohol concentration? • gender
•race
•blood type
• age

this is a good question and to answer that it is your gender. other factors are alcohol tolerance, medications, type of mix used, size of drink, food in stomach, altitude, your speed of how fast you drink, and body weight.

over half of the people in the united states rely on groundwater for drinking water.

it's true

the answer would be  

c. neighborhood watch

hope this .