B is the answer to the question
Neutrophils, because they are quick-response immune cells that recognize and destroy bacteria.
Take him out to dinner. maybe wash his car, buy him a new puppy. compliment his shoes, compliment his dad sandals with white socks. tell him yes, his high school letter jacket DOES fit. buy him McDonalds. look deep into his eyes, and say
" if you were a man, you'd get some braces so you don't look like Bugs Bunny..."
In this case, it will all came to the material of the target. The easiest one should be the one that is made by nylon target.
The hardest one to knock over would be made by materials such as silicone, which will basically provide strong deflection for the ball
hope this helps
I believe that 1 would be immune and 2 would be adaptive
