If a Plant Biologist Succeeds in Generating a Single Plant

If a plant biologist succeeds in generating a single plant with a particularly desirable flower, which of the following approaches would be the most efficient way to generate more plants with this trait?

A) backtrack through her previous experiments to obtain another plant with the same traits and cross the two
B) breed this plant with a plant that does not flower
C) clone the plant
D) force the plant to self-pollinate