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Option 1: According to option 1, the division of labor often involves specialized economic activity, and individuals engage in only a single activity and are dependent on others to meet their various needs. This option is saying that the division of labor involves specialization and dependence on others. This is correct.
Option 2: According to option 2, the division of labor often involves specialized economic activity, highly distinct productive roles, and individuals engage in only a single activity and are dependent on others to meet their various needs. This option is saying that the division of labor involves specialization, distinct roles, and dependence on others. This is correct.
Option 3: According to option 3, the division of labor involves involving everyone in many of the same activities. This option is saying that everyone is involved in the same activities. This is not correct as the division of labor usually involves different people specializing in different activities, not everyone doing the same thing.
Option 4: According to option 4, the division of labor often involves highly distinct productive roles and individuals engage in only a single activity and are dependent on others to meet their various needs. This option is saying that the division of labor involves distinct roles and dependence on others. This is correct.
Therefore, option 2 (1