What is the trachea commonly called?

A. Voice box
B. Vocal cord
C. Windflute
D. Windpipe
A? i don't get this please HELP ME!!!

4 answers

http://www.merriam-webster.com/dictionary/trachea
what is it doe D?
Yes, D.
Hey, bro. You're answer is D! :o) I took the quiz.