Research on expertise in memory indicates that

a. experts do not really perform substantially better than other people on memory tasks, when you consider memory for material related to their area of expertise.
b. experts are usually accurate in reconstructing missing parts of information from material that they partially remember.
c. experts typically have both a well-organized knowledge structure in a particular area and outstanding general memory skills.
d. expertise is primarily helpful because it exercises the mind, similar to the way a body-builder exercises the muscles of the body.

Ans: b