Disrupting the formation of which stem- loop structure of trpL would decrease the efficiency of transcriptional regulation?

A) 2- 4 (termination) stem loop
B) 2- 3 (antitermination) stem loop
C) 1- 3 (antitermination) stem loop
D) 1- 2 (pause) stem loop
E) 3- 4 (termination) stem loop