How Is the Ti Plasmid Used to Create Transgenic Plants

How is the Ti plasmid used to create transgenic plants?

A) The Ti plasmid inserts the foreign gene directly into the plant's nuclear DNA.
B) Once the Rhizobium radiobacter forms a tumour in the plant, the tumour cells can take up the foreign DNA and incorporate it into their chromosomes.
C) The Ti plasmid allows all of the plant cells to host the bacteria Rhizobium radiobacter and thus express the foreign gene that was inserted into the bacterial chromosome.
D) The Ti plasmid inserts the foreign DNA into the DNA in the chloroplast.