What must be true if unicellular organisms evolved into organisms in the domain Eukarya?
A. Having genetic material gave a survival advantage.
B. The formation of amino acids gave a survival advantage.
C. Being unicellular gave a survival advantage.
O O
D. Absorbing other cells gave a competitive advantage.

if you know your abc's you should be able to get your answer or just use google

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).