Nike Actually Started as Blue Ribbon Sports in 1964

Nike actually started as Blue Ribbon Sports in 1964. Taking the name Nike in 1971, the company was narrowly focused on running shoes, with the soles of the first shoes made in a waffle iron. Over time, the company expanded their shoe business to include shoes for all sports, and then sports equipment and apparel. It is not unusual to see a person dressed from head to foot in Nike gear and using Nike equipment as well. From this meager start, it seems Nike has engaged in:

A) product development.
B) market penetration.
C) diversification.
D) market development.