Which of the following statements are false？

A.The tangible nature of services makes their evaluation prior to purchase difficult.

B.The intangible nature of services makes their evaluation prior to purchase difficult.

C.The tangible nature of services makes their evaluation prior to purchase easy.

D.The intangible nature of services makes their evaluation prior to purchase easy.

正确答案：The tangible nature of services makes their evaluation prior to purchase difficult.The tangible nature of services makes their evaluation prior to purchase easy.The intangible nature of services makes their evaluation prior to purchase easy.