$9$lease identify what type of error the following sentence includes: He spoke with a heavy german accent, but I could understand him.

A$.$ Capitalization

B$.$ Punctuation other than commas or semicolons $($including hyphens and apostrophes$)$

C$.$ Commas or semicolons

D$.$ Number expression $($word or figure form$)$

E$.$ Symbols $($including dollar and percent signs$)$