Class systems differ from caste systems in that one’s status in a class system may, to some extent, be , while in a caste system it is not. a. achieved b. economic c. social d. ascribed

How we perceive, use, study, structure, interpret, and react to messages of time is referred to as: ?

Awaiver of the requirement for documentation of informed consent may be granted when: the investigator has no convenient place to store signed consent forms separate from the research datathe only record linking the subject and the research is the consent document and the principal risk is a breach of confidentiality. potential subjects might find some of the research questions embarrassing, personal, or intrusivethe subjects are literate in their own language; however, they do not read, write, or speak english

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