Which of the Following Is Correct with Regard to the Various

Short Answer

Which of the following is correct with regard to the various media?
Direct mail advertising has the highest advance costs of any advertising technique.
Direct mail advertising has the lowest cost-effectiveness of any advertising technique.
Radio advertisements are very expensive.
Magazine advertising is not very good at conveying to consumers the value of a product.
Outdoor advertising is the most important form of advertising based on spending by companies.