Answer:
you're answer would be C.magnetic resonance imaging
Step-by-step explanation:
magnetic resonance imaging (MRI) is done to check for brain tumors and computed tomography (CT) can also be done. Hence, if more than one option can be chosen it will be both the option A) brain computed tomography as well as C) magnetic resonance imaging. If only one option is to be selected it will be option C as MRI is the most widely used technique for testing brain tumor.
hope this answer is correct
(^^)