You are using a ruler to measure the width of a test tube. The edge of the test tube is between the 3 cm and 4 cm
marks. If centimeters are the smallest increments on the ruler, what measurement reflects the accuracy of the ruler?
A.)3.6 cm
B.)3.65 cm
C.)4 cm
D.)3 cm

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation:

so whats the answer

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.