Which boolean search terms would be most in researching this question?
"for small businesses, how do response rates from radio advertising compare with those from print advertising? "

a. "advertising" and "customers" and "effective"
b. "radio or print" and "small business" and "rates"
c. "small" and "business" and "advertising"
d. "response rate" and "radio or print" and "advertisement"

i think its either b. or d. probably d?