My father was passionate about the things: education and socialism. He was himself a born teacher. Indeed, he could never restrain himself from teaching, and as a small boy I was frequently embarrassed by his desire to instruct everybody people in railway carriage, for instant-though I realized even then that it was an innocent denies, quite free from vanity. He was equally ready to motive instruction Education, the man of his generation and temperament, was something it has largely ceased to be nowadays. It was the great golden gateway to the chanted realms of the mind.
The author often felt embarrassed by the behavior of his father because

Options

A. he taught badly
B. he taught even at odd places
C. he wanted to show off his learning
D. he lost self-control while teaching