Joan wants to take her 4-year old daughter and 6-year old son to a nearby swimming pool. Both of her children have started swimming lessons but are not experienced swimmers. Joan herself does not swim and does not know CPR. What should she do to keep her children safe? Choose a swimming pool with lifeguards on site. Take along a friend who knows how to swim and CPR. Watch her children closely while they are near the water. All of the above.