I believe it is C, I'm so sorry if im incorrect.
the answer should be the letter a
Answer:
Toolbar
Explanation:
j don't know if you meant that instead of scroll bar, but tool bar is the answer
Answer:
C) both a and b
Explanation:
13) The domain name system ________.
A) is a way to find a host's IP addresses if your computer only knows the host's host name
B) is a general naming system for the Internet
C) both A and B
D) neither A nor B