When deciding how to promote his new medical oncology center, Dr. Jones decided that he did not need to throw a large grand opening reception. Instead, he promoted the center to the internal medicine doctors in the area, who were the doctors most likely to refer patients to the center. Dr. Jones was engaged in what type of targeting strategy?

A) Undifferentiated targeting strategy

B) Local micromarketing strategy

C) A concentrated targeting strategy

D) Differentiated targeting strategies