Tracy suffered from chicken pox in her childhood. at age 25, she gets it again. however, this time she recovers with minimal treatment or medication. this was possible due to the "blank" cells produced by the "blank" immune response

Which of the following is the best example of positive peer pressure? a) your friend says “no ” to the dinner your dad cooked and prefers to hang out with friends instead b) your teammates keep making fun of you for spending so much time studying for friday’s math test c) your coworkers spend every weekend watching movies at tim’s house and invite you to join them d) your friends all sign up for a free class at the gym and suggest you sign up for it, too. brainliest to first correct answer.