Max has a group of goldfish in his tank at home. He notices that they are struggling a bit. Max wants to increase their rate of cellular respiration in hopes that it would help them to survive. Which of the following actions would potentially increase the rate of cellular respiration in the goldfish? a. Reducing the amount of food placed in the tank. b. Increasing the amount of carbon dioxide in the tank. c. Increasing the amount of oxygen in the tank d. Reducing the amount of sunlight that hits the tank.

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

Dshould be the right answer i think