For a Citibank Campaign to Market Home Equity Loans,the Bank

For a Citibank campaign to market home equity loans,the bank used "mail plus coupon plus 800 number plus outbound telemarketing plus print advertising." This kind of campaign is known as a ________.

A) single-vehicle, single-stage campaign
B) single-vehicle, multiple-stage campaign
C) multiple-vehicle, single-stage campaign
D) multiple-vehicle, multiple-stage campaign
E) none of the above