The best answer is this one: <span>d. it helps lessen the chance of consumers being manipulated into purchasing unnecessarily.
Unnecessary purchase is what the advertisers want, but it's not good for the consumers private finances. Identifying the tricks used in advertising would help consumers make better choices about what to buy. </span>
Gawain wears the green girdle as a symbol of his weakness. He behaved deceitfully and returned to Camelot bearing the girdle as a symbol of his failure in keeping his vow.