Use the Following Information to Answer the Question

Multiple Choice

Use the following information to answer the question.
A plantlike organism on the planet Pandora can have three recessive genetic traits: bluish leaves, due to an allele (a) of gene A; a feathered stem, due to an allele (b) of gene B; and hollow roots due to an allele (c) of gene C. The three genes are linked and recombine.
A geneticist performed a testcross with an organism that had been found to be heterozygous for the three recessive traits, and she was able to identify progeny of the following phenotypic distribution (+ = wild type) :

Which of the following are the phenotypes of the parents in this cross?

A) 2 and 5
B) 1 and 6
C) 4 and 8
D) 3 and 7