Which of the Following Statements About the Synthesis of RRNA

Which of the following statements about the synthesis of rRNA and tRNA in E.coli is true?

A) Both rRNA and some tRNAs are part of the same primary transcript.
B) Each rRNA sequence (16S,23S,5S) is transcribed as a separate primary transcript.
C) Primary tRNA transcripts undergo methylation,but rRNA sequences are not methylated.
D) The tRNA sequences all lie at the 3'end of the rRNA transcripts.
E) There is a single copy of the rRNA genes.