Final answer:
On a horizontal surface, with gravity as the only means of propulsion, the expected acceleration is 0.0 m/s² because gravity’s acceleration acts vertically downward and does not cause horizontal motion.
Step-by-step explanation:
The question pertains to the acceleration due to gravity, which is a key concept in physics. When considering the scenario where gravity is the only source of propulsion on a horizontal surface, the acceleration you would expect is 0.0 m/s². This is because the acceleration due to gravity is directed vertically downward towards the center of the Earth, which implies that on a horizontal surface without any inclines or declines, it does not contribute to forward or backward acceleration.
Therefore, the correct answer to the question is A. 0.0 m/s².