Solution

The question is asking about what motivates an individual the most among the given options. Option (a) suggests that money and material goods are the primary motivator, (c) implies that helping others is the main motivation, and (d) indicates that recognition and praise are the most important. However, the correct answer is (b), which suggests that personal development and progress are the primary motivators. This means that the individual is driven by the desire to learn new skills, acquire knowledge, and achieve personal growth. Such individuals may prioritize career advancement, education, or self-improvement activities in their lives.