By checking your pulse and seeing if you heart rate is in the target heart rate zone.
When researchers create Lesions they are destroying a piece of the brain. Lesions may be useful to researchers in understanding how the components of the brain produce cognition. Research involving lesions relies on two assumptions: that brain damage can affect different aspects of cognition independently, and that locally damaged brain functions identically to a normal brain in its "undamaged" parts.
The answer to your question is B
