Darlene sells roofing materials. The company provides a list of prospects, and she starts each sales call by asking the potential customer to explain their roofing needs. She uses a problem-solving approach to attempt to satisfy the customer's needs. In this scenario, which type of sales presentations is Darlene most likely using?
a) Selling formula approach
b) Consultative selling approach
c) Close presentation approach
d) Missionary approach
e) Canned presentation approach