The percent of young adults who lived with their parents was lowest during which of the following years?

Marianne's baby is sitting up, crawling around, and beginning to stand with a little help. Her baby is most likely to be about ______ months of age

a. 7 c. 11 b. 9 d. 13

During the first two years of life, the number of interconnections between neurons ______

a. decreases dramatically c. increases slightly b. decreases slightly d. increases dramatically