เฉลยแนวข้อสอบ Google AdWords Fundamentals – Which client would you advise to use radius targeting?

เฉลยแนวข้อสอบ Google AdWords Fundamentals –
84. Which client would you advise to use radius targeting?

a) Denise, whose service can reach customers within 30 miles
b) Mabel, who want to exclude her ads from certain cites
c) Christopher, who wants to promote his new product in select cities
d) Luis, whose e-commerce business delivers nationwide