Zach Has Always Been Good at Crossword Puzzles and Has

Zach has always been good at crossword puzzles and has done them all his life, as compared to his brother, Charlie, who hates word games and prefers to spend his time sailing. Both men are in their early 80s. When they were tested for their cognitive abilities, Zach easily outscored Charlie on the verbal measures, whereas Charlie outscored Zach on tests of visual rotation and spatial ability. Which hypothesis about the discrepancy between observed and measured cognitive performance would have predicted these results?

A) Different amounts of experience
B) Differences in type of cognition
C) Different standards of evaluation
D) Differences in the representativeness of the individuals or observations