Answer:
(A) a new potato plant grows from a potato
Step-by-step explanation:
Asexual reproduction is the kind of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes.
In the case of a potato plant growing from the main potato, the singled parent potato is responsible for the development of the new offspring and determines the genetic make up of the new plant and subsequent potatoes. In the particular scenario, their is no fusion of gametes and this form of reproduction is not sexual.