28-30. Which function of communication is best applied in the following?

28. Instructing the crowd to keep quite for the opening prayer.

A. Information dissemination
B. Control
C. Emotional expression
D. Motivation

29. Giving thumbs up to your classmate who is about to join the oratorical contest.

A. Information dissemination
B. Instructive
C. Emotional expression
D. Motivation

30. Putting up price tag on the groceries.

A. Information dissemination
B. Instructive
C. Entertainment
D. Motivation