I think that the answer is Yellow. At least that is the way it would work for human genes.
Answer:
Hi. I think the answer is A.
It must be able to reproduce. If it cannot reproduce, then it can't be considered a species, because it will die out.
Answer;
Mutualistic symbionts
The cattle and the microorganisms are mutualistic symbionts.
Explanation;
Symbiosis involves the interactions of two species living together; it may be mutualistic, parasitic or commensal.
Mutualism is a type of symbiotic relationship where both organisms involved benefit from the interaction.
For instance in this case; between cattle and microorganism; Cattle depend on microorganisms in their digestive tract to digest the cellulose in their diets, and in turn microoganisms gets nutrients and habitats from the cattle.