Which of the Following Is True About Screened Twisted Pair

Which of the following is true about screened twisted pair cable assemblies?

A) The drain wire and screen foil must be bonded at one end only.
B) The drain wire and screen foil must be bonded at every connection.
C) There is no need to bond the screen foil or drain because it is not important.
D) The drain wire and screen foil must be separately bonded at opposite ends.