Topic: Self-Management Skills / Attitude
Step 1: Understanding the Question:
We need to identify the statement that contradicts the known benefits of maintaining a positive mindset.
Step 2: Detailed Explanation:
A positive attitude acts as a catalyst for personal and professional growth.
It improves mental well-being (Option A) and fosters social harmony, making it easier to connect with others (Option B).
Furthermore, staying optimistic allows for a clearer mind, which aids in logical decision-making (Option D).
However, suggesting that it "decreases success" is factually incorrect because positivity generally increases resilience and motivation, leading to higher success rates.
Step 3: Final Answer:
The statement "It decreases one's chances of success" is the only negative outcome listed and is therefore not related to a positive attitude.
Final Answer: It decreases one's chances of success.