Sentence Correction (SC) | Re: New techniques in thermal-scanning photography, a process

New techniques in thermal-scanning photography, a process that records radiation from surface areas, makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before.

(A) makes it possible to study the effects of calefaction, or warming, of a river in greater detail than ever before
SV error : Techniques(plural) makes (singular) : incorrect
(B) make it possible to study, in greater detail, the effects of calefaction, or warming, of a river than
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