Research studies conducted by those in professional disciplines fall into several categories. which of these is concerned with the distribution and determinants of health, diseases, and injuries in human populations? a. clinical researchb. basic science researchc. epidemiological researchd. health services research

c. Epidemiological research

Explanation:

Epidemiological research -

The term Epidemiology , refers to the study involving the study of diseases over the wholesome area of population of a specific organism , which could be humans or animals , involving the cause , effect and symptoms of the disease .

The people doing  Epidemiological research , find the factors which can lead to the disease and the factors to help people fight against the disease  .

The disease could be smallpox , as it can spread from person - to - person and hence is a cause of concern .

the correct answer on edge is

c) pair 6

the federal government of the united states was established by the constitution. us is a presidential republic. the president is head of state, head of government and of a two party legislative and electoral system. the supreme court balances the powers of the federal and the state government. yhe executive branch is headed by the oresident. there are two chambers of congress, the senate and the house of representatives. judicial power is exercised by the judicial branch (or judiciary), comprised of the supreme court and lower federal courts. the judiciary's function is to interpret the   constitution as well as the federal laws and regulations.