The united states has an open class system based on social mobility that includes a. horizontal mobility. c. intergenerational mobility. b. vertical mobility. d. all of the above select the best answer from the choices provided a b c d

Option D i.e All the above is the correct answer.

The United States has an open class system based on social mobility that includes horizontal mobility, intergenerational mobility and vertical mobility.

Horizontal mobility refers to movement from one position to the another within the same social status while as vertical mobility refers to the movement from one social status to the another. Intergenerational mobility is the change in social status between different generations within the family.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

idk let me see fdfdgdg