In ads T$-$Mobile compares its $99\%$ coverage to AT&T$\text{'}$s $89\%$ phone coverage of the U$.$S$.$ The objective here is to get potential customers to dislike AT&T and possibly switch to T$-$Mobile. This can be seen as an example of trying to

Change affective component of consumer attitudes

Change cognitive component of consumer attitudes

Change behavioral component of consumer attitudes

Change all the three components of consumer attitudes

You cannot change consumer attitudes