Can someone please help me with this

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.

In exchange for land, a knight agrees to be a sort of sub-vassal to a vassal. this agreement was known as: investiture homage tyranny subinfeudation

“as well as a constitutional human right to associate with whomever you , there should be a corresponding right to disassociate if you .” - lester maddox which statement about lester maddox is best supported by information from the quotation? question 1 options: lester maddox was a segregationist. lester maddox enforced the constitution. lester maddox believed in the freedom to associate. lester maddox supported the 1964 civil rights act.