To What Does the 9 + 2 Arrangement of Microtubules

Multiple Choice

To what does the 9 + 2 arrangement of microtubules, typical of cilia and eukaryotic flagella, refer?

A) the relationship between the basal body and the axoneme
B) the length of the structures
C) the arrangement of dynein arms with respect to each microtubule
D) the arrangement of microtubules within the axoneme