A scientist sequences both strands ofa DNA molecule and determines that 30% of the nucleotides areadenine. The composition of the other nucleotides must be
A. 30% thymine, 30%cytosine, 30% guanine
B. 70% thymine, 15%cytosine, 15% guanine
C. 30% thymine, 20%cytosine, 20% guanine
D. 30% thymine, butcannot determine % of cytosine and % of guanine
E. 70% thymine, butcannot determine % of cytosine and % of guanine