Abundant Synthesis of the E Protein from the Bacteriophage ϕX174

Abundant synthesis of the E protein from the bacteriophage ϕX174 would lead to premature lysis of the host cell.Which of the following mechanisms controls the synthesis of the E protein?

A) The mRNA is transcribed from a weak promoter.
B) The open reading frame has a weak ribosome binding site.
C) The secondary structure of the mRNA prevents translation of the E protein.
D) The repressor protein prevents transcription of the mRNA.
E) There is a strong transcriptional terminator upstream of the E gene.