Because many French Canadians are worried about preserving their heritage, they want Quebec to become

A. the capital of the country.
B. a French colony.
C. a separate country.
D. part of the United states.

To determine the correct answer, we need to understand the context of the question. French Canadians are a distinct cultural group within Canada, primarily residing in the province of Quebec.

Option A, "the capital of the country," is not directly related to preserving French Canadian heritage. The capital of Canada is Ottawa, which represents the entire country, not a specific region or culture.

Option B, "a French colony," does not align with the current political situation in Quebec. Quebec is not a colony but a province within Canada.

Option C, "a separate country," is a possibility. There is a separatist movement in Quebec that advocates for Quebec's independence from Canada. This option aligns with the concerns of preserving French Canadian heritage, as it would enable French Canadians in Quebec to have more control over their cultural and political affairs.

Option D, "part of the United States," is not a commonly expressed desire among French Canadians in Quebec. Quebec has a distinct cultural identity separate from that of the United States.

Given these considerations, the correct answer is C. French Canadians who are concerned about preserving their heritage may support Quebec becoming a separate country.