Instructions: Determine if the missing word needs an apostrophe and if so, where does the apostrophe belong? If it needs no apostrophe, select the word without an apostrophe. Before the Zamboni was invented, a tractor shaved the ice. Then ____ cleaned away the slush; sprayed water over the new, smooth ice; and waited for it to freeze, a process that took up to an hour. a. workers' b. workers c. worker's