Question

1. if someone claims that a diary is biased, what does that mean? it is written in a very formal style. its details may not be completely accurate. it includes feelings as well as facts. it was written without firsthand knowledge.

Explanation:

A biased diary means its details may not be completely accurate. Bias can skew the representation of events. Formal style (first option) is about writing manner, not bias. Including feelings (third option) is common in diaries and not necessarily bias. Lack of firsthand knowledge (fourth option) is about source, not bias.

Answer:

Its details may not be completely accurate.