The fact that all congressional districts in a State must have about the same number of people so that one person's vote is equal to another's, is due to the?

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups.b. a researcher conducts a linguistic study of comments posted on a local public blog.c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression.d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.

Arecent challenge to the european union created by a member state is?

What caused the settlement of more african americans in the mississippi alluvial plain region then in the ozark mountains region?