Read the passage carefully and give the answer of question given below. Once while travelling by the local bus, I got a seat beside a very strange man. He seemed interested in every passenger aboard. He· would stare at a person, scribble some odd mathematical notations on his long notebook and then rriove on to the next. Being quite interested in what he was doing I asked him what all those notations meant and then came the startling reply. He saw a man's face not as a single unit but as thousands of squares put together. He was in fact a statistical expert and a budding artist learning the art of graphics.
The man was-scribbling down

Options

A. The figures of co-passengers
B. The details of thousands of squares put together
C. Some mathematical formulae and calculations
D. Some mathematical signs