Read the passage.
Select the sentence that violates the guidelines for
apostrophes.

Apostrophes
The apostrophe is a widely misused punctuation mark. In
proper usage, the apostrophe indicates either a possessive
case or where a letter or letters have been removed. An
apostrophe is used to indicate a plural in only one special
case-when there is a lowercase letter that is plural, such as
in the phrase mind your p's and q's.

All employee's must wash their hands before returning
to work. Any employee who doesn't will be warned for
the first offense and fined for each subsequent offense.
The restaurant's reputation and success depend on
keeping a high health rating. Please help us keep our
health department rating in the high 90s.

The sentence that contains a mistake with the use of apostrophe is "The restaurants reputation and success depending on keeping a high healthy rating."

In this case, there are two possible answers to indicate a possessive case:

1) an apostrophe should be placed after the word "restaurant's" if it refers to one restaurant only

"The restaurant's reputation and success depending (depend) on keeping a high healthy rating."

2) an apostrophe should be placed after the word "restaurants' " if it refers to restaurants in general

"The restaurants' reputation and success depending (depend) on keeping a high healthy rating."

The rest of the sentences does not violate the rules of apostrophe usage.

All employee's must wash their hands before returning to work.

Explanation:

for example: in, he, a,from