Introduction:
The biggest Canadian island is Baffin Island, which is option C. Baffin Island is located in the territory of Nunavut, Canada. It is the largest island in Canada and the fifth-largest island in the world.

Explanation:
Baffin Island is known for its vast size and stunning natural beauty. Here are some key points to understand why Baffin Island is considered the largest Canadian island:

1. Size:
Baffin Island has an area of approximately 507,451 square kilometers (195,928 square miles), making it the largest island in Canada. It stretches over 1,300 kilometers (800 miles) from southwest to northeast.

2. Location:
Baffin Island is located in the northeastern part of Canada, in the territory of Nunavut. It is surrounded by the Labrador Sea to the east, the Davis Strait to the south, and the Arctic Ocean to the north and west.

3. Geography:
The island is characterized by its rugged mountain ranges, deep fjords, and extensive glaciers. The highest peak on Baffin Island is Mount Odin, which stands at 2,147 meters (7,044 feet) above sea level.

4. Inhabitants:
Baffin Island is home to various indigenous communities, including the Inuit people who have inhabited the region for thousands of years. The largest community on the island is Iqaluit, the capital of Nunavut.

5. Wildlife:
The island boasts a diverse range of wildlife, including polar bears, arctic foxes, caribou, and numerous bird species. It is also a habitat for marine mammals like seals, walruses, and whales.

Conclusion:
In conclusion, Baffin Island is the largest Canadian island and the fifth-largest island in the world. Its vast size, majestic landscapes, and unique wildlife make it a significant part of Canada's natural heritage.