单项选择题

​Anne, a beautician by profession, owns a salon in the small town of Franklin, New Jersey. Every weekend, she makes it a point to visit the other salons in Franklin to find out about the beauty services they offer to customers. Anne is attempting to conduct marketing research by ________.​
​​

A.forming alliances with competing firms
B.using experimental research techniques
C.checking out rivals
D.tapping into marketing partner expertise
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