Darius and his friend love to race each other home from school, but darius loses by a few seconds every day. he takes these friendly races seriously and has decided to work on his speed so that someday he will be able to beat his friend's time. which of the following sports would best darius improve his speed?

Asoccer mom is driving her 75 year old grandmother and her 9 year old daughter home after the game. the grandmother and daughter were both in the back seat and both were wearing their seat belts. a car ran a red light in front of them, causing them to t-bone that car on the passenger side. fortunately there were no serious injuries, but the grandmother did sustain several rib fractures. the mother, daughter and driver of the at-fault car were shaken up but unhurt. what are some possible reasons that the grandmother sustained rib fractures while the other victims did not?