Why are some of carl linnaeus’s classifications of organisms incorrect?

Carl Linnaeus classified organisms by appearance and physical features. In his time, this was accepted. As time went on, he was deemed incorrect due to new discoveries. However, he did help the scientific community in another way. He classified organisms with their common ancestors.

A.Linnaeus did not study the anatomy of organisms. B.Linnaeus's work accounted for evolution. C.Linnaeus did not use structural comparisons.