Choose the correct answer A, B, or C to fill in each blank in the following passage

Ex 8. Choose the correct answer A, B, or C to fill in each blank in the following passage.
With the development of webcams, video conferences are (1)
Thanks to this technology, people (2)
more and more popular.
different corners of the world can meet.
for discussion and learning. It saves them a lot of time and money while travelling.
However, there are some drawbacks to video conferences. First, participants need high-speed Internet
Out 4
(3)
connections to clearly experience the meeting's sound and images. Second, it is easy (4)
hours.
1. A. become
companies may require their employees to meet outside of office
up a video meeting, (5)
B. becomes
C. becoming
D. became
D. in
2. A. from
C. to
B. at
3. A. face to face
C. offline
D. online
B. in person
D. sets
C. setting
4. A. set
B. to set
D. so
C. or
5. A. and
B. but