11. Anthropogenic climate change________.
(A) decreases the global temperature and influences mostly the tropical and subtropical forests, which more often suffer fromfrost events.
(B) warms the ocean water r and causes the change in the directions of the ocean currents； as a result, there is more rain in dryareas, leading to such anomalies as flowering deserts.
(C) is a directional change in global climate, which Iasts for several decades, and is likely caused by human activities.
(D) does not exist, because scientists never found any evidence of it.
(E) can be stopped by planting trees.