Sometimes it is a good idea to strengthen a logical appeal in a speech by: o
removing some evidence.
B. mentioning opposing arguments.
C. telling a joke.
D. asking for additional time.

B. mentioning opposing arguments.

Explanation:

Mentioning opposing arguments, along with countering these arguments to further strengthen your own argument, will make the logical appeal much greater, as well as show that you are not afraid to aknowledge that there are two sides to every argument.

compare & contrast informative essay/speech

when speaking or writing for the sole purpose of providing information in order to give audience members a good basis for making a decision, you would present an informative speech or essay.   because you wouldn’t want to be persuading the audience by arguing for one type of exercise over the other, you wouldn’t choose a persuasive/argumentative technique.   to fairly, and without bias, present information about the pros and cons of each type exercise, a compare/contrast, informative speech/essay would be the best bet.