In term of the cracks in reinforced concrete structures, which of the following statements is wrong.

A、In addition to the load effects, concrete shrinkage, temperature change, uneven settlement of the structure will also cause concrete cracking;

B、Due to the heterogeneity of concrete materials, the initiation, distribution and development of cracks are of significant variation, so the crack spacing and width are uneven;

C、The average value of crack spacing and crack width has certain rules, which reflects the mechanism of bond between reinforcement and concrete;

D、The crack width can be reduced by using longitudinal reinforcement with larger diameter