Which Technique Would Be the Best Strategy for a Researcher

Multiple Choice

Which technique would be the best strategy for a researcher to study the ability of infant over 1 year of age to categorize?

A) showing pictures and recording how long he or she looked at different pictures
B) presenting objects from two categories and recording how he or she touches them
C) using brain imaging studies to record changes when he or she is shown various pictures
D) recording which toys, out of a wide selection, he or she prefers to play with