Final answer:
The c. Pacific Maritime Region on Canada's west coast receives the most rainfall, especially in the fall season, with 80 to 100 inches annually.
Step-by-step explanation:
The region that receives the most rainfall in Canada is the c. Pacific Maritime Region.
This region encompasses Canada's west coast, which receives the highest precipitation rates, varying between 80 and 100 inches per year, particularly during the fall season. Among the options given, option C, Pacific Maritime Region - Fall, is correct.