Mom asks four-year-old joy to pick out all of the big green buttons from the button box. joy picks out all of the big buttons. mom explains that she wanted all of the big green buttons. this time joy picks out all of the green buttons including large and small ones. joy cannot focus on two elements at one time. what cognitive limitation best explains that joy could not pick out all of the big green buttons? a. centrationb. static reasoningc. irreversibilityd. focus on appearance