If Elizabeth persuades an audience that too much salt in a person's diet increases the risk of heart disease, she has influenced her listeners' _______

Television signals travel

A) on paths matching the Earth's curvature. B) somewhat faster than light. C) best when there's good ground conductivity. D) in a straight line.

An environmental group used various communication technologies to convey the dangers of sound pollution to the public

Since the message was filled with complex theories and jargon, an overwhelming majority of people did not accurately understand it. What is this barrier to effective communication called? a) Lack of message penetration b) Presence of competing messages c) Presence of self-selection d) Lack of self-perception