How many Hydrogen atoms are in the chemical equation 3H20 a. 3 Hydrogen atoms
b. 2 Hydrogen atoms
c. 7 Hydrogen atoms
d. 6 Hydrogen atoms

you can have just about every answer you can think of

the last one: artificial selection/genetic engineering

plant breeding is modifying the genetic composition of the plant - but this isn't cloning (which is specifically introducing a gene into a genome). but you are artificially selecting for the phenotype that you want.

the second one is literally genetic engineering - the gene would have been cloned first and then inserted or genetically engineered into the new plant cell (the cotton).