What is the height in meters (m) of a 5 feet (ft.) and 3 inches (in) person?

The investigation aims to determine who can throw a baseball the farthest. To make this a fair comparison, all conditions that could affect the throwing distance, other than the player's ability, should be kept constant.

• A. Height of players: While player height can influence throwing ability, in an experiment comparing different players, their individual heights are usually considered part of their unique characteristics being tested, not a variable to be controlled unless the experiment specifically aims to study the effect of height.
• B. Color of the baseballs thrown: The color of the baseball has no impact on how far it can be thrown.
• C. Spot from which players throw: This is a crucial constant. If players throw from different starting points, the measured distances would not be comparable, making it impossible to accurately determine who threw the farthest from a consistent reference.
• D. Order in which the players throw: The sequence in which players throw does not affect the physical outcome of their individual throws.

Therefore, the most important factor to keep constant for a fair comparison of throwing distance is the spot from which they throw.

The correct option is C.

• C. Spot from which players throw.

To find the height in meters, we first convert the height from feet and inches to total inches, then to centimeters, and finally to meters.