The following sentence has a mistake.
It is very importtant to proofread all documents carefully.
To fix this mistake, you should
put the cursor after the word "mistake" and add a comma
place the cursor after the first "t" in "important" and press Delete
O place the cursor before the word "important," press Delete, and type a capital "T"
o place the cursor after the word "carfully," press Backspace five times, and type an "e"