The author suggests that most critics have undervalued Johnson's abilities as a jazz and blues performer, had little interest in Johnson's influence on jazz, and had little regard for classical works. What is the author's opinion about Johnson's abilities and influence?
1) The author believes that Johnson's abilities as a jazz and blues performer were underrated, and his influence on jazz was overlooked.
2) The author thinks that Johnson's abilities as a jazz and blues performer were overrated, and his influence on jazz was insignificant.
3) The author believes that Johnson's abilities as a jazz and blues performer were properly recognized, and his influence on jazz was acknowledged.
4) The author thinks that Johnson's abilities as a jazz and blues performer were average, and his influence on jazz was moderate.