B. Allowed the slave states to count a slave as three-fifths of a person.
Answer: Mobile Health Application (m-Health)
Explanation: m-Health apps also known as e-Health apps are platforms which allow patients get in touch with their health care providers through phones, tablet, computer etc. Patients are able to get access to their personal health records, get medical advice from their health care providers as well as prescriptions for illnesses which are not termed serious.
the cotton gin allowed slaves to not have to pick the cotton seeds off by hand. the more efficient cotton gin allowed plantations to produce and sell cotton a lot faster