"I think the heater is broken today" is an example of a tag question

Research suggests that Americans can identify a caller's ethnic background from the single word "hello" a maximum of 10% of the time

Indicate whether this statement is true or false.

In using examples, illustrations, and narratives, it is important to

A) stress the relevancy of the material to your audience. B) present real and hypothetical examples in the same way. C) always create extended examples to add the most clarity. D) avoid the use of hypothetical examples.