(A) The three mRNAs represent alternatively spliced transcripts due to the presence of putative intronic sequence in the gene.
(B) The gene sequence was characterized by the presence of potential polyadenylation signals that resulted in premature termination of transcription.
(C) Expression of full-length transcripts (1257 bases) was lethal to the transformed cells.
(D) The transgenic plants were chimeric in nature and comprised of a mix of transformed and untransformed cells.
Which of the following combinations of the above statements would correctly explain the obtained results ?