Given below are some statements related to the dihybrid cross performed by Morgan (considering the body colour and eye colour as the two characters for study). Which of the following would you choose to find out the location of the gene for body colour?

I. Deviation of F₂ progeny from the usual 9:3:3:1 ratio
II. Appearance of more parental combinations in F₂ generation
III. Appearance of more non-parental combinations in F₂ generation
IV. Linked inheritance of body colour and eye colour in Drosophila

A) I and III only
B) I, II, and III
C) I, II, and IV
D) II and IV only