Reinforcement occurs if a behavior is only reinforced some of the time.
a. continuous
b. positive
c. intermittent
d. negative

i think its A) Positive reinforcement

Intermittent

Explanation: The word explains itself: occurring at irregular intervals; not continuous or steady. This also has nothing to do with either a positive or negative emotional response

the aorta is the large artery leaving the heart branches into smaller arteries, which eventually branch into capillaries.the arteries carry oxygen and nutrients away from your heart, to your body's tissues. the capillaries are small, thin blood vessels that connect the arteries and the veins. the statement that arteries carry oxygen-rich blood to capillaries is true. veins on the other hand are blood vessels that take oxygen-poor blood back to the heart.