Which Is True of Practice

Which is true of practice?

A) People rarely believe that stunning talent and amazing accomplishment derive from inherited, genetic or "interior" explanations.
B) Dedicated, regular, long-term practice leads to low levels of skilled performance.
C) Practice within a particular domain strengthens that knowledge, pushes problem-solving components closer to automaticity, and gives you a deeper understanding of the domain.
D) It will yield special-purpose heuristics that combat mundane stereotyped knowledge through the development of stronger declarative memory production systems.