Rachel Is a 6-Month-Old Who Has Recently Learned to Sit

Multiple Choice

Rachel is a 6-month-old who has recently learned to sit up on her own. Her mother places two toys in front of her: a soft, yellow, stuffed animal within her reach and a colourful rattle slightly out of her reach. Seeing both toys, Rachel chooses the one she finds more appealing to play with. Over time, choices such as these may influence:

A) the development of her personality.
B) her development of crawling.
C) the development of her understanding of cause and effect.
D) All of the answers are correct.