S1. Mastery over any art form requires years of dedication and perseverance. S2. It takes 10,000 hours of practice to become an expert in a field. The second statement:

The first statement emphasizes that mastery of an art form requires years of dedication and perseverance. The second statement quantifies this with the famous '10,000 hours rule' — that becoming an expert requires extensive practice. Both statements convey the same idea: significant time and effort are required to achieve mastery/expertise. The second is fully consistent with and supports the first. It is not the 'only possible explanation' since other explanations (talent, mentorship, etc.) exist, but it is fully consistent. Hence (b) is fully consistent with the first is correct.