Residents of three villages with three different types of water supply were asked to participate in a survey to identify cholera carriers. because several cholera deaths had occurred recently, virtually everyone present at the time underwent examination. the proportion of residents in each village who were carriers was computed and compared. what is the proper classification for this study? a. cross-sectional studyb. case-control studyc. prospective cohort studyd. retrospective cohort studye. experimental study

Which effect does an increase in a country’s literacy rate have on the people who live there?

U.s. history i which statement is true? the missouri compromise ended slavery in the south. the compromise of 1850 eliminated slavery only in the south. the missouri compromise postponed the issue of slavery. the compromise of 1850 ended slavery in every region of the united states.

“dear sir: it is with great reluctance, i trouble you on a subject, which does not fall within your province; but it is a subject that occasions me more distress, than i have felt, since the commencement of the war; and which loudly demands the most zealous exertions of every person of weight and authority, who is interested in the success of our affairs. i mean the present dreadful situation of the army for want of provisions, and the miserable prospects before us, with respect to futurity. it is more alarming than you will probably conceive, for, to form a just idea, it were necessary to be on the spot. for some days past, there has been little less, than a famine in camp. a part of the army has been a week, without any kind of flesh, and the rest for three or four days. naked and starving as they are, we cannot enough admire the incomparable patience and fidelity of the soldiery, that they have not been ere this excited by their sufferings, to a general mutiny or dispersion. strong symptoms, however, discontent have appeared in particular instances; and nothing but the most acitive efforts every where can long avert so shocking a catastrophe.” what’s the central idea?