Answer: Cold canvassing
Explanation:
Cold canvassing is the method in which employers are directly contacted and approached through the medium of calling other party,messaging etc to present the product of service to the customers.It is the technique of marketing field to increase the benefit from improving business.
Relevant skills and ideas for approaching other organization are evaluated first and then it is presented to them so that appreciable response can be received.
According to the question, Frank is using cold canvassing technique by leaving the detail carrying flyers on the doorsteps of the customer, which is a direct way of approach.This will help him to get new customers and improve his business.
