What factors influence the point of view of an author of a document/source

The following factors can influence someone's point of view:

Past Experience — what someone is likely to notice or understand.

Culture — ethnicity, gender, country of origin, region of origin, language, socio-economic status, religion, political beliefs.

someone or something lol

i don't think it's c or d. i think it's either a or b.

hope this .