A Competent Hemophilus Strain Is Individually Transformed by Three Genes

Multiple Choice

A competent Hemophilus strain is individually transformed by three genes (a, b, and c) at a rate of 0.002% each. However, cotransformation frequencies for each pair are as follows: a and b 0.38 %
A and c 0.72%
B and c 0.19%
What is the correct conclusion from this data?

A) Genes b and c are farthest apart.
B) Gene order is c, b, a.
C) Cotransformation of b and c is so frequent, they must be one gene.
D) Gene a is closer to b than to c.
E) Genes a and c are farthest apart.