The Study in Which 6-Year-Old Children Were Presented with a 5-Day

The study in which 6-year-old children were presented with a 5-day training program designed to improve effortful attention demonstrated that learning:

A) can improve intelligence test scores but not brain processes.
B) can change brain processes but not intelligence test scores.
C) can improve both intelligence test scores and brain processes.
D) improves neither intelligence test scores nor brain processes.