Which of these best describes why it's a good idea to be aware of a group or individual's agenda before we allow their message to affect our decisions?

Knowing their agenda allows us to take their bias into account before forming our own opinion. If they have a specific agenda, the message might not include all of the information needed to make an informed decision. Certain facts might also be twisted to better fit the group's agenda and before making your decision, you should know the true facts.