Which statement about Canada's national parks is accurate? 

A)  National parks occupy only 30% of Canada's land mass. 
B)  Canada has 23 national parks. 
C)  Canada's national parks are managed according to a preservationist ethic. 
D)  Resource extraction is permitted in Canada's national parks.

Canada's national parks are indeed managed with a preservationist ethic, aiming to protect natural environments for public understanding, appreciation, and enjoyment, while ensuring natural resources and ecosystems remain intact for future generations. The other statements are inaccurate; national parks do not occupy 30% of Canada's land mass, there are more than 23 national parks, and resource extraction is generally not permitted within national parks.