What Is the Key Difference Between Magnetic Resonance Imaging (MRI)

Multiple Choice

What is the key difference between magnetic resonance imaging (MRI) and functional magnetic resonance imaging (fMRI) that makes it so useful for neuroscientists?

A) MRI only works on people while they are sedated, and fMRI only works on people while they are awake
B) MRI shows the structure of the brain (anatomy) , while fMRI shows changes in activity levels across brain areas over time
C) MRI is used for other parts of the body, while fMRI can be used on the brain
D) MRI cannot tell you about differences in brain functioning across people, while fMRI can be used to compare people