$[1]$ Our survey indicates that in the past three months, employees$$ ability to self$-$identify personal strengths and weaknesses has improved $12$ percent. $[2]$ Initial data analysis indicates that this ability to self$-$reflect has improved the productivity of work groups and teams. $[3]$ This change will likely have an affect on the company$$s bottom line.

Which mechanical error appears in sentence $3?$

Jargon

Punctuation

Word substitution