Which Is the Best Explanation of the Roaring Forties

Which is the best explanation of the Roaring Forties?

A) the period in the 1940s during which the islands of Oceania achieved independence from their colonizers
B) the temperature (in Fahrenheit) experienced by most of the islands of Oceania throughout the year
C) the high westerly winds that circle Earth around the 40th parallel south, unimpeded by large landmasses
D) the number of islands in most of the archipelagos of Oceania