Which sentence correctly uses a colon? The rock climber laid out her gear: rope, climbing shoes, and a helmet. The climbers said that: "Pull-ups help climbers build upper body strength." The climber prepared to climb the boulder: by looking for good hand holds, putting chalk on her hands, and setting out thick crash pads. In the summer, the climber will tackle boulders: in the Grand Canyon and Zion National Parks.
