A Competent Bacterial Strain with Genes A, B, and C $a$

A competent bacterial strain with genes a, b, and c is transformed by a donor bacterial fragment. Cotransformation frequencies for each gene pair are as follows: $a$ and $b \quad 0.04 \%$
$a$ and $c \quad 0.02 \%$
$b$ and $c \quad 0.0064 \%$ Which conclusion can be definitively made from this data?

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