Ten-Year-Old Delaney Is Helping Her Dad Put New Shingles on Her

Multiple Choice

Ten-year-old Delaney is helping her dad put new shingles on her playhouse in the backyard. Her dad asks her to put the shingles in order from longest to shortest so that he can vary the start of each row. She is able to do this because she

A) can think abstractly.
B) can perform seriation tasks.
C) understands dual representation.
D) understands conservation.