请选择ABCD1p/`6[5\8H7m;o2s:m8H The doctor often tells him ____ more exercise.6q;g2f1\7r+`1y7\3n1f.Q2N
A. to take6q;g2f1\7r+`1y7\3n1f.Q2N
B. taking6q;g2f1\7r+`1y7\3n1f.Q2N
C. taken6q;g2f1\7r+`1y7\3n1f.Q2N
D. take6q;g2f1\7r+`1y7\3n1f.Q2N