Which behavior prevent the spread of stis caused by contact with infected blood?
avoiding body piercings and tattoos
avoiding alcohol and smoking pot
avoiding the use of someone's combs, picks, or brushes
avoiding contact sport

delegated (sometimes called enumerated or expressed) powers are specifically granted to the federal government in article i, section 8 of the constitution. this includes the power to coin money, to regulate commerce, to declare war, to raise and maintain armed forces, and to establish a post office.