Eighteen-Month-Old Liam Is Putting Together a Puzzle

Multiple Choice

Eighteen-month-old Liam is putting together a puzzle. Liam's father begins by pointing to where each piece needs to go and then straightening out each piece as Liam places them on the puzzle board. As Liam's competence with the task increases, his father gradually withdraws support. This is an example of

A) scaffolding.
B) cooperative learning.
C) reciprocal teaching.
D) transitive inference.