Which of the following was not a primary concern of charlemagne?

1.)establishing a central government to rule his territory.
2.)building a standing army.
3.)conquering norse-held lands of sweden and denmark.
4.)strengthening the christian faith across europe.

3. Conquering Norse-held lands of Sweden and Denmark was not a primary concern of Charlemagne, as he had nothing to do with these lands.
On the other hand, establishing a central government, building a standing army, and strengthening the Christian faith across Europe was very important to him, as to any other ruler at the time. 

The mercantilism option