Simple predicate is the verb in the sentence. A verb is the action, so in this case, the thing that the nurse does, which is teach. so, the answer is c. teach.
In a line of poetry, an iamb is a foot or beat consisting of an unstressed syllable followed by a stressed syllable, or a short syllable followed by a long syllable. For example, deLIGHT, the SUN, forLORN, one DAY, reLEASE.