Some television stations chose to air infomercials as an alternative to the previous perform of ________.

Some television stations chose to air infomercials as an alternative

1.	Some television stations chose to air infomercials as an alternative to the previous perform of ________.
A.	sign-off.
B.	sign-on.
C.	itv1.
D.	itv.
Answer» B. sign-on.