The author begins this article with ______.

A．they tend to look into a situation from all different angles to work out a solution
B．they try to attack their problem in every possible way on the basis of the assumption that there must be a solution to the problem
C．they believe there is a solution to every problem and will examine the problem in different ways
D．they think careful and logical analysis is indispensable to the solution of a complicated problem

A．reveal the cunning of the greedy money-lender
B．introduce his topic of lateral and vertical thinking
C．help the readers to think of possible solutions to the problem
D．invite advice for the unfortunate girl