Which one of the following is not an early indicator of a potential insider threat? (antiterrorism scenario training, page 3)
abnormal mood swings, depression, and suicidal remarks
presence of unauthorized weapons
aggression or threats toward co-workers
a reasonable disagreement with a us government policy

That which is NOT an early indicator of a potential insider threat is: A reasonable disagreement with a US Government policy

A potential insider threat refers to behaviors that can lead an individual within the security services of the United States to snitch on the government or sell it out to enemies.

Of all the options provided having a reasonable disagreement about the policies of the government is not an insider threat because it is only normal that as citizens of a nation, people might disagree with governmental policies that they do not deem right.

Learn more about potential insider threats here:

link

i would say b. research typically uses a variety of sources

abu bakr, was a senior companion and—through his daughter aisha—a father-in-law of the islamic prophet muhammad. abu bakr became the first openly declared muslim outside muhammad's family. abu bakr served as a trusted advisor to muhammad.