What is the most obvious sign of bias in a historical text?

Lack of accuracy on Facts.

Explanation:

Taking into consideration the question about obviousness and the type of text, the lack of accuracy is one of the most significant bias one can see in any historical text.

When we talk about history, it requires a vast ammount of details including dates, places and even some info about possible occurred events. But when a text does not completely give this information with exact accuracy it leads the reader to have more questions to be answered rather than a full text comprehension.

a.) are both appointed for life

i know number 8 is something about only using 3/5 of the slave votes.