Procedural (procedural is the knowledge of how to DO something, declarative is more like facts and is conscious learning)
D. would be better students with greater cognitive development.
https://www.litcharts.com/lit/the-things-they-carried/themes/shame-and-guilt
The family is not very strong at promoting nationalism: for once, there can be family members of other nationalities, which would promote multinationalism! so we can reject a) and c)
now, military and state religion are both found in the other options and we have to choose between school and athletics - and school is more effective! so the correct answer is D.