Ramona is a woman. Stefan is a man. Which of the following statements is TRUE regarding potentialdifferences in the corpus callosum between these two individuals?

A. Stefan's corpus callosum is probably the same size as Ramona's.
B. Ramona's corpus callosum is larger than Stefan's.
C. Ramona's corpus callosum is slightly smaller than Stefan's.
D. Stefan's corpus callosum is much larger than Ramona's.