The effect explains the different impact that the advertising exposure will have on the same audience member if the exposure occurs in one media option rather than another

vehicle option source

Explanation:

vehicle option source is advertisement  management  technique in which manager used to advertise the same audience through different media sources i-e television, radio ans so on . As mangers observed that some media sources  have greater impact to attract consumer than other media sources. As people perceive and attract differently depending on media source.

the earthquake in haiti was a magnitude of 7.0 according to the u.s geological survey yet the smaller earthquake in haiti killed more than 200,000 and left more than 1.2 million people homeless. the chile earthquake was a magnitude of 8.8 and 500 times more stronger but chile's earthquake only injured 712 people.

answer; the president uses mass media to gain support for policies;