Gary is bilingual (Mandarin and English) and has aphasia, due to a stroke. Which of the following may be true about his recovery? A) If he speaks better in Mandarin immediately after the stroke, his Mandarin speech abilities will always be better than his English speech abilities. B) His Mandarin and English speech abilities will always recover at the same rate. C) If his Mandarin is improving in the first few months of recovery, then his English abilities will likely never improve. D) all of the above