Foo May May Is Assisting Her Three-Year-Old Son, Alex, to Build

Multiple Choice

Foo May May is assisting her three-year-old son, Alex, to build a tower out of Lego blocks. At first, Alex needs lots of help. However, as he becomes more confident, his mother steps back and allows him to build on his own. The distance between what Alex can do on his own and the potential level of development he might attain given help or assistance from his mother, refers to Vygotsky's

A) zone of proximal development.
B) zone of greatest assistance development.
C) zone of cephalo development.
D) zone of least assistance development.