The correct comparison of long-term fitness goals and short-term fitness goals among the options provided is:
A. Short-term fitness goals add up over time to produce long-term fitness goals.
Short-term fitness goals are specific, achievable objectives that are typically set to be accomplished within a short time frame (weeks to a few months), while long-term fitness goals are broader objectives aimed for over a longer period (months to years). Short-term goals often serve as stepping stones toward achieving longer-term goals.