Which Is Factor in Fueling the Trend Toward Integrated Communication

Which is factor in fueling the trend toward integrated communication approach in public relations?

A) continued growth of organizations
B) larger budgets for organizational marketing and communication
C) marketing of products/services generally unaffected by public and social policy issues
D) advertising, because of high costs, isn't the silver bullet that it used to be
E) merger mania in today's business world