Q: In this task, you're given a question, a context passage, and four options which are terms from the passage. After reading a passage, you will get a brief understanding of the terms. Your job is to determine by searching and reading further information of which term you can answer the question. Indicate your choice as 'a', 'b', 'c', or 'd'. If you think more than one option is plausible, choose the more probable option to help you answer the question.
Question: CCGS Larbrador served a icebreaker in which country's navy? Passage:CCGS Labrador was a icebreaker. First commissioned on 8 July 1954 as Her Majesty's Canadian Ship (HMCS) Labrador (pennant number AW 50) in the Royal Canadian Navy (RCN), Captain O.C.S. "Long Robbie" Robertson, GM, RCN, in command. She was transferred to the Department of Transport (DOT) on 22 November 1957, and re-designated Canadian Government Ship (CGS) Labrador. She was among the DOT fleet assigned to the nascent Canadian Coast Guard (CCG) when that organization was formed in 1962, and further re-designated Canadian Coast Guard Ship (CCGS) Labrador. Her career marked the beginning of the CCG's icebreaker operations which continue to this day. She extensively charted and documented the then-poorly-known Canadian Arctic, and as HMCS Labrador was the first ship to circumnavigate North America in a single voyage. The ship was taken out of service in 1987 and broken up for scrap in 1989.
Links: a. Northern Canada b. Royal Canadian Navy c. Canadian Coast Guard d. Ship breaking
A:
b