A . break a leg ! and plus it's the only one who really makes sense to me
B. mostly by barge along the Chesapeake and Ohio Canal
Explanation:
Popuation growth is when a population is growing due to a number of reasons, it can be because they generation has found an adaptive trait that they can use to survive in there environment, or it can be because the predator-to-prey ratio is on point either way it is not uncommon for population growth to be an everyday sight.