What’s this answer to the question

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

What period of history refers to the time when people did not have written records

Aryans believed that the most important thing in life was warfare. if this statement is true, which of the following facts best supports it?