Which sentence supports the claim that gene transfers are a breakthrough that could help humans?
"After years of observing and experimenting with these types of creatures, scientists
discovered a protein called green-fluorescent protein, which is responsible for giving
the jellyfish and other creatures the ability to glow."
"The answer to that question lies not in the fact that the dog glows but that
scientists have created a method to transfer genes."
© "And these gene transfers could lead to a better understanding, if not a cure, for
many different kinds of diseases."
"However, though many studies have been conducted using human volunteers,
the type of gene testing that scientists have done on dogs cannot be conducted on
humans."