We might safely infer that local merchants and small firms do not often use national television advertising simply because_____
A、they can’t afford the huge costs
B、it will not bring them the profit in proportion to their advertising expense
C、it does not cover the whole market
D、radio advertising can reach to a wider audience
【正确答案】：B
【名师解析】:选项B是正确的答案。小企业和本地商人通常不使用国家电视广告的原因是，这种广告方式可能不会给他们带来与其广告支出成比例的利润。这是因为电视广告的成本可能很高，而且小企业的目标市场可能更局限，使用电视广告可能不会有效地触及他们的目标客户群体。因此，他们可能会选择成本更低、更有针对性的广告方式。
