Sentence Correction

Proponents of artificial intelligence say they will be able to make computers that can
understand English and other human languages, recognize objects, and reason as an
expert does—computers that will be used to diagnose equipment breakdowns,
deciding whether to authorize a loan, or other purposes such as these.
(A) as an expert does—computers that will be used to diagnose equipment
breakdowns, deciding whether to authorize a loan, or other purposes such as
these
(B) as an expert does, which may be used for purposes such as diagnosing
equipment breakdowns or deciding whether to authorize a loan
(C) like an expert—computers that will be used for such purposes as diagnosing
equipment breakdowns or deciding whether to authorize a loan
(D) like an expert, the use of which would be for purposes like the diagnosis of
equipment breakdowns or the decision whether or not a loan should be
authorized
(E) like an expert, to be used to diagnose equipment breakdowns, deciding
whether to authorize a loan or not, or the like

OA is C

What i don't understand is how can we compare an action "reason" with the word "like" - shouldn't actions be compared with "as" ?