In a Cotransduction Experiment the Alleles A+, B+, and C

In a cotransduction experiment the alleles a+, b+, and c+ were studied. The allele a+ alone was transduced into an auxotroph 1750 times, b+ alone 1700 times, and c+ alone 1725 times. Alleles a+ and b+ were both found 11 times, b+ and c+ 117 times, and a+ and c+ 15 times. What can you definitely conclude?

A) Genes b and c are more closely linked than a and b or a and c.
B) The genes are all located extremely close to each other.
C) Genes b and c are found together only if double crossovers have occurred.
D) The gene order is a, b, c.
E) Genes a and b are more closely linked than a and c or b and c.