Question

Which of the following is the most effective thesis statement?
The Department of Education’s ad campaign promoting literacy is effective in a number of ways.
It uses a number of strong persuasive techniques to convince a wide audience of individuals that strong reading skills are of importance.
The literacy campaign by the Department of Education is effective because it appeals to a large general audience.
The Department of Education’s literacy advertising campaign uses several persuasive techniques to persuade a broad audience that strong reading skills are beneficial.

Answer 1

Option 4 is the most effective. It names the subject (Department of Education’s literacy advertising campaign), takes a clear, arguable position (it uses persuasive techniques), and specifies the effect (convincing a broad audience that reading skills are beneficial).

If you want it tighter, revise to remove the repetition:
"The Department of Education’s literacy advertising campaign uses several persuasive techniques to convince a broad audience that strong reading skills are beneficial."