33.Comparison of the above four constructs (I, II,III , IV) for the transcription of mRNA of gene A, which of the following; is in a correct order for the expression of gene A (From high to low)?  
(A) I，II，III，IV

 
(B) IV，III, II，I 
(C) II,I, III, IV
(D)III，II， I，IV
(E) I, II，IV，III