Select the correct passive voice of the given sentence. She is teaching the children Botany through video - conferencing.

• A. Botany has been taught by her to the children through video - conferencing.
• B. Botany is learnt by the children through video - conferencing.
• C. Video - conferencing by her is being taught to the children through Botany.
• D. Botany is being taught by her to the children through video - conferencing.