22. The DNA isolated from two organisms A and B was found to contain unique sequence (i.e., no repetitive sequences). The Cot1/2 values for A- and B-DNA were 20 and 2 M s, respectively. These results suggest that: (A) the size of A-DNA is ten times larger than B-DNA. (B) A-DNA is circular and B-DNA is linear. (C) the sizes of A-DNA and B-DNA are the same. (D) the size of B-DNA is ten times larger than A-DNA.