Tanaka asks Suzuki to do two main things: first, 'check the content' (内容をご確認), and second, 'add the sales forecast graph' (グラフを追加して). The correct answer combines both of these requests. Wrong answer 1 is incorrect because Tanaka has already created his part. Wrong answer 2 is incorrect because Tanaka asks for a graph to be added, not just the data. Wrong answer 3 is incorrect because the deadline is 'by tomorrow morning' (明日の午前中まで), not 'by the end of today'.