Answer: A) Exhausted.
Explanation: The connotation of a word is the meaning given by the context or even by the readers (or listeners) based on their emotions or personal experiences. From the given options, the word that represents the tone that the connotation of the word "stumbled" conveys, is the corresponding to option A: exhausted, after waking up at 5 a.m. for an early morning practice, Ricardo was exhausted for the rest of his classes.