A Researcher Is Studying Plant Development

A researcher is studying plant development.She isolates a mutant and discovers that the piece of DNA that is mutated does not code for a protein.However,this piece of DNA is complimentary to a gene known to function in early embryonic plant development.The mutant she identified most likely functions as an_______.
A)general transcription factor known to regulate many different genes
B)ribosomal RNA rRNA)
C)microRNA miRNA)
D)transfer RNA tRNA)
E)intron