All of the power are held by one single central government in this type o
f government

The primary purpose of a certificate of confidentiality is to: allow law enforcement to investigate abuse cases.protect researchers from disclosing conflicts of interest.prevent subjects from knowing the purpose of a study.protect identifiable research information from compelled disclosure.

What’s the reason for not digging up aztec ruins in modern mexico city

Einar sees alexandra every day across the room in his history class but has never talked with her. einar likes the way alexandra looks, including the way she dresses and how she wears her hair. he's even more attracted to her apparent intelligence and the way she handles herself in class discussions and during interactions with the instructor. he'd like to know more about her, so he asks one of his friends about her. einar, using a passive strategy to gain information about her, is probably in the preinteraction awareness stage of any relationship that might develop between them. t/f