Which photometric method only measures the minimum center of the field of view?

According to Baidu's educational materials, which photometry method only measures a very small part of the center of the field of vision? A. average measurement. B. central key metering. Central bond average photometry. Area measurement. The correct option is C. center key average metering. Source of this question: Wisdom Tree knows the answer to the chapter "Photography Basis (Wuhan Institute of Technology and Business)".

Central focus photometry is a traditional photometry method. Most camera metering algorithms pay attention to about 2/3 of the center of the picture, and consider the periphery.