Chloe saw that her friends didn't have training wheels on their bicycles and decided that she could ride better without them. Which two social-cognitive concepts are at work here?

elf efficacy and Social comparison

Explanation: Self efficacy is an individual's belief that he/she can make a certain thing to happen. It is

an individual's belief in his or her capacity to cause an intended event to occur or to bring about an intended result.

Social Comparison is a theory that postulates that an individual determines his/her own social and personal worth based on the stand up for themselves against others. People evaluate their own opinions and abilities by weighing themselves to others in order to reduce uncertainty in these domains and learn how to define themselves. This is simply a belief that there is s drive in individuals to gain some level of accuracy in self devaluations.

answer; /// i believe the correct answer is (achilles tendon)(c)