$4$

$0\mathrm{.}5$ points

According to your book, which of the following options is not a key principle in designing a public health campaign?

Transmit your message through several channels rather than one principal channel.

Appeal to as many people as possible in your message.

Be aware that actions can be more empowering than words alone.

Consider the amount of mental effort that will likely be required for the target audience to understand your message.