I am not 100% sure but I believe it's A. a deck of cards based on my logic.
A baseball and a coffe mug is too big and an open palm can vary in size too much.
A measure of tactile acuity defined as the smallest separation at which two points applied simultaneously to the skin can be clearly distinguished from a single point. It varies from 1 or 2 millimetres in the finger pads and tongue to more than 60 millimetres on the upper arm, upper thigh, and back.
1 Gallon = 3785 mL
5mL used in = 1 day
1 mL used in = 1/5 day
1 Gallon used in = 3785 / 5 = 757 days
The answer is D. Muscles tense.
