How can you to prevent muscle mass loss as you age?
a. cut back on the amount of calories you eat during the day.
b. lift weights twice a week.
c. you can't prevent muscle mass loss; it's inevitable as you get older.
d. maintain a regular exercise program.

What are possible challenges for cyberbullying? the answer is sample response: possible challenges of cyberbullying have to do with nonbelievers, or people who do not think cyberbullying is a real problem. technology makes it hard to stop bullies, and some people do not want to take responsibility.