During the attenuation of the trp operon, which stem loop leads to polycistronic mRNA synthesis during tryptophan starvation?
A) 1-3 (antitermination) stem loop
B) 3-4 (termination) stem loop
C) 1-2 (pause) stem loop
D) 2-3 (antitermination) stem loop
E) 2-4 (termination) stem loop
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