Final answer:
Generation X, which includes about 7 million Canadians, is generally recognized as being born between the early 1960s and the 1980s. According to this, the closest matching answer to the question is option a) 1957-1966.
Step-by-step explanation:
Generation X, a cohort of people following the baby boomers, is typically defined as those born between the early 1960s and the 1980s. This timeframe is supported by various sources that describe generational characteristics in society, like the changing attitudes towards aging depicted by the baby boomer generation. Comparing this with the provided answer options, option b) 1967-1976 does not align with the generally accepted range for Generation X. Given the commonly accepted timeframe, the correct range for Generation X, which accounts for around 7 million Canadians, would be option a) 1957-1966.