Which famous Canadian figure skater was prominent in the 1950s and 60s?

Barbara Ann Scott is the correct answer because she is widely recognized as one of the most prominent Canadian figure skaters of the 1950s and 60s. She gained international fame when she won the gold medal in women's singles at the 1948 Winter Olympics in St. Moritz, becoming the first Canadian to achieve this feat. Her influence extended beyond the ice, as she became a symbol of Canadian sports and femininity during that era, inspiring many young athletes.

Nellie McClung, while a significant historical figure, was primarily known for her work as a suffragist and advocate for women's rights rather than for sports. Mary Pickford was a famous actress and producer in the early 20th century, known for her contributions to the film industry but not associated with figure skating. Igor Gouzenko, on the other hand, was known for his role in exposing Soviet espionage in Canada during the Cold War and is not linked to figure skating in any way. Thus, Barbara Ann Scott stands out as the prominent figure skater during the specified time period.