
Passage: There are thousands of genes in nature. Which genes are the most common and abundant? After successfully decoding a large number of genomes, a research institute found the answer: transposons, known as "selfish DNA". The abundance and breadth of transposon genes indicate that they play a vital role in evolution and the maintenance of biodiversity.Biology textbooks generally believe that the enzyme that can fix carbon dioxide in photosynthesis is the most abundant enzyme on earth, and some scholars have speculated that the genes that can encode this enzyme should also be the most abundant. But the study found that transposons, known as "junk DNA", instead dominate the known genetic world.
Question: Which of the followings, if true, can best support the speculation of the scholar(there is a version of the findings of the study)?
A. A.The basic function of transposons is to spread themselves everywhere.
B. B.The same enzyme is sometimes encoded by different genes.
C. C.Different enzymes may have the same gene to encode.
D. D.Different enzymes require different genes to encode.
Answer: