Advertisers Are Reluctant to Use Magazines as an Advertising Medium

Advertisers are reluctant to use magazines as an advertising medium because:

A) the results of magazine advertising cannot be measured.
B) magazines have a low cost per thousand (CPM) .
C) magazines have to contend with the problem of increasing circulations,which increases printing costs.
D) magazines cannot deliver high frequency.
E) magazine circulation figures are increasing worldwide.