Which answer best describes the definition of a personal agenda?

an intent to spread an ideology

they seek to spread the ability to report without and bias

changing facts to confuse the reader

leaving out information to trick the reader

"An intent to spread an ideology" is the best answer because agendas are usually idea-based and thus, depending on the context, having an agenda means that the person (s) is/are trying to influence others with their beliefs either subtly or through obvious ways.