11 Many national parks have trails and reachable adventures, _________ everyone to enjoy the beauty of America’s protected spaces.
(A)allowing
(B)preventing
(C)restricting
(D)forcing

許多國家公園都設有步道和各種易於到達的探險活動，_________ 讓每個人都能欣賞到美國自然保護區的美景。