Be
which sentence reflects the correct usage of a plural possessive noun?
olympic snowboarders determination drives them through the rigorous' training required to remain competitive in the sport.
olympic snowboarders's determination drives them through the rigorous training required to remain competitive in the
sport.
olympic snowboarders' determination drives them through the rigorous training required to remain competitive in the sport.
olympic snowboarders determination drives them through the rigorous's training required to remain competitive in the
sport

recent brain research has shown some surprising benefits as a result of formal musical training. learning to play a musical instrument appears to develop parts of the brain that can even influence academic results. the studies indicate that the earlier a child begins training, the more benefits there are. one such study showed that children who began musical studies before the age of seven had a more developed brain in the region where language production and auditory processing take place. scientists believe there is mounting evidence to show that early musical training can improve brain function.

explanation:

ok i am here, i brought some cookies and some movies. do you use blu-ray cuz thats all i brought. oh, and my friend wwill be here shortly, he is going to bring some pizza too.