_____ therapy places somewhat greater weight on behavioral procedures than _____ therapy does

Frank is 14 months old and uses only bottle, no, up, bye-bye, mama and dada when he talks. However, when the family is on their way to visit Frank's grandmother, and his mother tells Frank to get his red tiger from the bedroom and bring it with him, Frank quickly runs to get the tiger. This episode demonstrates that toddlers:

a. can understand more words than they can actually produce b. can produce more words than they can actually understand c. have difficulty pronouncing phonemes they have never heard d. tend to overgeneralize irregular verbs and nouns

At the beginning of its journey from the testis, a sperm cell is transmitted through an elaborate system of ducts by the continuous movement of:

A) ?cilia. B) ?lipids. C) ?blood. D) ?urethral sphincters.