The sleep/wake cycle and body temperature cycles are usually synchronized in humans

By the end of middle childhood ___________________________________

a. fine motor development has nearly reached adult maturity b. children's drawings look about the same as they did in early childhood in terms of level of detail c. improvements in fine motor skills are seen primarily among children who were educated in a formal school setting d. most children are just beginning to learn to tie their shoes

Relationship success requires

A) a considerable amount of work. B) finding the right person. C) having a certain "chemistry" with the other person. D) avoiding individuals with high self-esteem. E) avoiding individuals with low self-esteem.