Answer: C, Informative speeches provide unbiased information, is the correct answer.
Explanation: Option A is not entirely accurate because both informative and persuasive speeches can provide facts, but the key difference is how those facts are used and the overall purpose of the speech. Option B is not necessarily true, as emotional content can be present in both types of speeches, although it may be more prominent in persuasive speeches. Option D is not always true; not all persuasive speeches must include a call to action, although many do.