What is important to remember when dropping off application materials in person?

A. ask any stranger you see to proofread your application before submitting it
B. be polite and dress well in order to make a good first impression
C. the receptionist taking application materials probably isn't the person hiring, so it's not important to make a favorable impression
D. this isn't the interview, so you can dress casually and not worry about the condition of your application materials