(1) Cutting generally refers to cutting off the stem of a plant, inserting it into the soil after treatment, and then each branch can take root and sprout and grow a new plant. Plants such as willows and poplars are suitable for propagation by cuttings from their stems. The roots, stems, and leaves of plants are vegetative organs. Propagation using roots, stems, and leaves is also called vegetative propagation. It can be seen from the above that what is described in the poem should be cutting technology.
(2) Grafting is asexual reproduction. There is no process of combining sperm and egg cells to form fertilized eggs. Therefore, the offspring generally will not mutate and can maintain the stability of the excellent traits of the grafted scion, while the rootstock generally does not. Have an impact on the genetics of the scion. Therefore, if you want a rose to bloom flowers of many different colors, you can use branches or buds of flowers of different colors as scions and graft them onto one plant.
So the answer is: C; A