Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to choose the right car seat [title] Choose an infant car seat if you have a newborn baby. [step] If you have a newborn baby, you should invest in a rear-facing infant car seat. These seats are designed to be safer for babies that weigh between 22 and 35 pounds.

Ending1: [substeps] When sitting in the seat, the baby's head should be at least 1 centimeter (0.4 in) away from the side of the seat. If not, the car seat is too small. Ending2: If you are having a newborn baby, look for one with wheels, rather than a collapsible daycar seat. [substeps] Newborn babies tend to be more active, which means they need more room to fidget. Ending3: [substeps] Infant cars seats are available from 17 out of 20 manufacturers. [title] Select an infant car seat if you have a newborn baby. Ending4: They also protect infants from falling down and may give them more control over their feet. These babies are lightweight and easy to hold, and can also offer excellent stability in the car if they fall.

Answer format: ending1/ending2/ending3/ending4