Scientists discovered a fossilized cockroach trapped in amber, which was supposed to be about 50 million years old. dna fingerprinting and comparison with today's living cockroaches revealed that modern cockroaches have certain additional genes which allow them to survive in today's colder climate. which of these could be the correct explanation for this discovery?

change in gene frequency of ancient cockroaches led to the evolution of modern cockroaches.

somatic modification in ancient cockroaches led to the evolution of modern cockroaches.

modification of all the genes of ancient cockroaches led to the evolution of modern cockroaches.