<span>my guess is d. cable television</span>
A musical instrument is being used in order to make musical sounds.The consort that is made of the same types of instruments is called a whole.Hope this is the right answer and would be of big help in this assignment.
I believe the correct answer to this is:
groin vaults are constructed by placing barrel vaults at right angles to cover a sqaure space known as a bay.
Hope this helps :)