Which of the following statements best distinguishes a class system from a caste system in terms of socioeconomic factors?

A class system is different from a caste system mainly because class systems allow for social mobility, meaning people can move up or down in society based on their achievements, such as education or job success. In a caste system, however, people's social status is fixed from birth, and they cannot change it regardless of their efforts or accomplishments. For example, if someone is born into a wealthy family, they have more opportunities to succeed, while someone born into a less privileged family may find it very hard to improve their situation in a caste system. This difference in mobility shows how class systems are more flexible compared to the rigid structure of caste systems, which are often based on inherited status. Overall, class systems emphasize personal effort and achievement, while caste systems are based on predetermined social positions.