The correct answer is C. The cashiers’ wages were docked for two weeks in a row.
Step-by-step explanation:
One of the main functions of an apostrophe is to show the relationship between two nouns, especially in terms of possession. For example in "Patrick's bag is blue" the apostrophe shows the blue bag belongs to Patrick. Besides this, apostrophes can be used for contractions as in "She's young".
According to this, the correct sentence is "The cashiers’ wages were docked for two weeks in a row" because it is correct to use the apostrophe to show the wages belong to the cashiers or are related to them. Also, it is not necessary to add more apostrophes in the sentence because there are no contractions or any other noun that owns something.