A nurse is reinforcing teaching about home safety with the guardians of a toddler. Which of the following statements by a guardian indicates an understanding of the teaching?

"The water heater should be set to 120 degrees Fahrenheit or less."

"I can leave my child alone in the bathtub for up to 15 minutes after they learn to swim."

"Open windows are safe as long as the screens fit snugly."

"I will tell my toddler to never touch a firearm."