Which sentence is correctly spelled and capitalized?

ADon and leon reported on their efforts to find volunteers to work concessions at the Oakmont high game.
BDon and Leon reported on their efforts to find Volunteers to work concessions at the Oakmont High game.
CDon and Leon reported on their efforts to find volunteers to work concessions at the Oakmont High game.
DDon and Leon reported on there efforts to find volunteers to work concessions at the Oakmont High game.