Data shows that the average temperature in the united states has increased over over the last 50 years. which of these statements are true

a. this is a statement about weather

b. this statement cannot be proven

c. this is a statement about climate.

d. the recent cold spell in the midwest shows this cannot be true

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).