Which conclusion can be drawn from the passage? OA. Ragtime music had an influence on European music.
OB.
Scott Joplin is the founder of American jazz.
OC.
Modern music can be traced as a progression of style.
OD.
Modern pop music is based on European styles.

OB. Scott Joplin is the founder of American jazz.

Explanation:

I hope this helps:)

I would say that the best option to create an argument about this topic would be option A Homework is an effective way to strengthen students’ understanding of new concepts. From this statement, the essay can be developed by providing ideas to support it.  
Option B can be considered a definition of homework.
Option C is a generalization about HW and the last option states the way in which teacher can assign hw.