are fluid and tissue such as blood, urine, or saliva used to run tests and diagnose or treat diseases. A.
Transfusions

B.
Periscopes

C.
Samples

D.
Centrifuges

A transfusion

Explanation:

because transfusions are blood in the veins

Samples

Explanation:

datz wat u'll be told if u want to run a test

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.