So, when this question says "Analyze the foot". Let's stop there, the key point in this little question would be the word "foot".
When finding the "foot" or the point or even the root of something, which in this case the word "Blatant", we would want to find the deep roots in this, the (true) and straight forward meaning of this following word.
(Blatant).
The foot of this word would be: (Bad Behavior).
The proper definition of this word would be unashamed, or even in today's world, being a "savage" would also be a synonym of this word.
The best example of a primary source among these options that you've mentioned is an interview with her dad who is a Vietnam veteran. She can get all the details she needs from a person who was actually there.
