The answer to the question above is letter "C. enables humans to live forever". Human beings, as we are, we are bound to face death when time comes and that we are not immortal. Other choices are beneficial uses of the genetic engineering.
I would say A.lies dormant for an extended period of time
Black rotten old never smoke
Answer:
to compare a sewer overflow withthe human body, a buch of sickle cells can clog the blood stream and may cause the stream to break, and with the overflow a lot of water is in the sewer so the water push out to make it spit out the sewer pipes.
I think that it is a but im not sure of that so dont be dependant on my anwser
