Simplify the following text for a Grade 10 native English-speaking person.
Original: For some beginning wind instrument students , however , D major is not a very suitable key , since it transposes to E major on B-flat wind instruments , and beginning methods generally tend to avoid keys with more than three sharps .
Simplified: For some beginning wind instrument students , however , D major is not a very good key , because it transposes to E major for B flat instruments .