Final answer:
Harold Gillies played a significant role in the development of plastic surgery before 1914, pioneering techniques for reconstructive surgery during World War I.
Step-by-step explanation:
The correct answer is B. Harold Gillies. Before 1914, Harold Gillies played a significant role in the development of plastic surgery. He was a New Zealand-born British physician who is considered the father of modern plastic surgery. Gillies pioneered techniques for reconstructive surgery during World War I, particularly for facial injuries. His work laid the foundation for the advancement of plastic surgery as a medical specialty.