What sentence is used not correctly?

Study the map below. based on the information shown on this map, which ofthe following locations served as an eastern border for the mongol empire?

Meter you are working as an apprentice for the bksb newcastle arena. an indoor sport exhibition is coming to the arena. your supervisor has asked you to set up a handball pitch and seating area as shown in the plan view below

Which sentence is correctly punctuated? a. i haven’t found a new job, and i don’t plan to look for one until i have to. b. my work is piling up—day to day—and i can’t seem to get caught up. c. i know things could be worse (they have been in the past).