Explanation:

- The passage talks about two routes to achievement: conformity and originality.

- Conformity involves following the crowd and sticking to known paths and status quo.

- Originality, on the other hand, involves taking a different approach that challenges existing norms.

- Option 1, "quietly," doesn't fit as it relates to noise level, not frequency.

- Option 2, "far," indicates distance, which doesn't align with the context.

- Option 3, "frequently," implies doing something often and does not fit well in the context of rarity being described.

- Option 4, "less," is the most appropriate as it implies the rarity or infrequency of the road traveled in originality.