Explanation:
The phrase "burning the candle at both ends" is an idiom that means someone is working excessively hard or engaging in too many activities without giving themselves enough time to rest or relax. It implies that the person is exhausting their resources or energy by trying to do too much. In this context, it is suggested that the person's actions are negatively impacting their life.

Meaning of the options:
a) Wasting his money: This option refers to the person spending their money frivolously or without care. While it could be a consequence of burning the candle at both ends, it is not the central focus of the phrase or the person's situation.

b) Becoming overgenerous: This option refers to the person being excessively generous, which may lead to financial strain or other issues. However, it is not directly related to the phrase "burning the candle at both ends."

Correct answer:
c) Overtaxing his energies: This option accurately captures the meaning of the phrase. "Overtaxing his energies" refers to the person exerting themselves excessively, leading to physical or mental exhaustion. It highlights the negative impact of their actions on their well-being.

d) Losing his objectives: This option suggests that the person is losing sight of their goals or objectives. While it could be a consequence of burning the candle at both ends, it does not directly address the physical or mental strain caused by excessive work or activity.

Conclusion:
Option c) "Overtaxing his energies" is the correct answer because it best represents the negative consequences of someone burning the candle at both ends. It accurately reflects the idea of exhausting one's resources or energy by overworking or engaging in too many activities.