Final answer:
Caffeine is a diuretic and can lead to excessive urination, which may cause dehydration if fluids are not adequately replenished.
Step-by-step explanation:
Excessive urination due to caffeine consumption is most likely to lead to dehydration. Caffeine is a diuretic, which means it can increase the frequency of urination. Excessive urination can lead to the loss of water and electrolytes from the body, which, if not replenished, can result in dehydration.
Dehydration is a condition that can cause symptoms such as weakness, dizziness, and heart palpitations. In severe cases, it may lead to more serious consequences like kidney stones, heart disease, and even death. Therefore, it is important to maintain a balanced intake of fluids to prevent dehydration, especially when consuming diuretic substances like caffeine.
The correct answer to the student's question is (a) Dehydration.