The correct answer is: Replacement of defective genes with normal genes
Recombinant DNA molecules are made in laboratory by the methods of genetic recombination such as molecular cloning. The aim of these methods is to bring together genetic material from different sources, creating “combinations” that usually couldn’t be found in the genome. The process of recombination is possible because, DNA molecules from all organisms share the same chemical structure (nucleotides are same among different species, difference is only in the nucleotide sequence).
B, as far as we know humans aren't from space
There were several ways that the enlightenment from Europe to America was spread. The most integral way was the high literacy rates in the New England colonies that enables the settlers to read books and newspapers. The correct answer is A.
