Linda owns a fashion store for women, and her main focus is on providing quality customer service. She trains her staff to treat customers with utmost care and to provide them with reliable fashion advice. Linda carefully chooses her staff and appoints people who are attentive, are friendly, and have a good fashion sense. In this case, Linda is using $\_\_\_\_\_.$

a$.$

normative control

b$.$

bureaucratic control

c$.$

adaptive control

d$.$

concertive control