the answer is: B. Promote a distinct Canadian culture and avoid saturation by U S programming
The entertainment industry in Canada surpass 15 Billion dollars in Gross Domestic Product each year. If the Canadian government does not support it, the huge chunk of Canadian economy would be taken by companies form united states (which is the most dominant force in entertainment industry globally).
Beside the economic benefit, When programs from Canadian entertainment is watched by people form other country, Canada could promote its culture and improve its relationship with people from different cultures.