$15.$ When writing the attention getter for a persuasive message a write a brief and engaging opening sentence.b$.$ write a detailed sentence that includes relevant and irrelevant points.c$.$ backup your claims.d$.$ do none of the above$\mathrm{.}16.$ Which of the following statements is accurate?a$.$ Sales and marketing messages must be truthful.b$.$ Sales and marketing claims must be backed up with evidence.c$.$ Sales and marketing messages aimed at kids have special rules.d$.$ All of the above$17.$ Which of the following is a key idea for closing a persuasive message?a$.$ Make it easy for the reader to act.b$.$ Offer testimonials or additional facts.c$.$ Address the reader by name.d$.$ Use the hard sell briefly$\mathrm{.}18.$ What are selling points?a$.$ Advantages that purchasers may gain from the productb. A product's most attractive featuresc. Messages that address a purchaser's potential objectionsd. Attention$-$getting devices in the text of persuasive messages$19.$ What is the difference between a sales message and a marketing message?a$.$ Sales messages are hit$-$hitting and aggressive; marketing messages are soft, indirect, and subtle.b$.$ Marketing messages move potential buyers through the purchasing process; sales messages encourage a buy decision.c$.$ Sales messages move potential buyers through the purchasing process; marketing messages encourage a buy decision.d$.$ There is no difference in these messages.