Final answer:
Sentences B and D most emphasize the convenience of school uniforms by outlining the simplicity and reduced conflict they provide to the school routine.
Step-by-step explanation:
The two sentences from the passage that most emphasize the convenience of uniforms are:
- B) Everyone knows exactly what the kids need to wear: their regulated school uniform.
- D) When there's no debate on what a student is allowed wear to school mornings are easier for all parties involved.
Both sentences highlight the straightforwardness and ease that uniforms bring to the school environment by eliminating daily clothing choices and potential clothing-related conflicts.