Final answer:
The correct answer to the question is C) You, as it aligns with the understanding that individuals have control over their own attitudes and state of mind despite external influences.
Step-by-step explanation:
The question posed is deeply rooted in the concept of personal responsibility and the power of an individual to shape his or her own attitude and mental state. While there are external influences such as "Destiny," "Circumstances," and "Others" that can have an impact on one's life, it's widely recognized in psychological and philosophical discussions that each person ultimately has control over their own reactions and state of mind.
The correct answer to the question is C) You. This is aligned with the belief in personal agency and the idea that individuals are not wholly determined by external forces but can exercise free will in choosing their reactions and attitudes. Our beliefs and responses to situations are influenced not only by external factors but also by internal processes that we can control. This is why a lot of research and teachings, especially in fields related to mental health and personal development, focus on empowering individuals to believe in their own capacity to affect positive change within themselves and their environments.