Steven, a 6-year-old, can correctly name objects, catch a ball and throw it, and write his abcs in proper sequence. his younger brother harvey is much less speedy and skillful in all of these areas. what is the best explanation for steven's superior performance? question 19 options: a) steven has fewer dendrites than harvey. b) steven's brain has experienced greater myelination than harvey's. c) steven most likely eats healthier foods than harvey. d) steven's frontal cortex is less mature than harvey's.