The transcription terminator stops dna polymerase, and results in the polymerase falling off the dna template. adds a terminator nucleotide to the rna, and results in a hairpin loop structure in rna. stops dna polymerase, and adds a terminator nucleotide to the rna. results in a hairpin loop structure in rna, and stops dna polymerase. results in a hairpin loop structure in rna, and results in the polymerase falling off the dna template.

Results in a hairpin loop structure in RNA, AND results in the polymerase falling off the DNA template.

Explanation:

As the RNA polymerase arrives at the terminator site, it pauses. The termination of RNA transcription occurs when an RNA transcript with a self-complementary sequence is formed leading to the formation of the hairpin structure. The hairpin structure has 15-20 nucleotides.  

The hairpin structure of RNA weakens A=U base pairs in RNA-DNA hybrid and/or weakens the interaction between RNA and RNA polymerase. The overall effect is the dissociation of RNA polymerase from the complex and termination of the transcription.

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the question isn't complete here so i can't right an answer '_'