Which of the following statements about connective tissue is NOT true?

A)Connective tissues contain cells capable of differentiating into muscle and bone in animals that can regenerate these tissues
B)Loose connective tissue contains fibroblasts,different kinds of fibers,and a nonliving matrix
C)Blood is a connective tissue that contains a fluid matrix
D)Collagen is a fat molecule with little tensile strength but great stretching ability