Repeated Sequences Make Genome Sequencing Challenging for of All of the Following

Repeated sequences make genome sequencing challenging for of all of the following reasons EXCEPT:

A) repeated sequences are typically longer than the short sequences obtained by automated sequencing.
B) there is no easy way to determine how many copies of the same repeat are present within one chromosome.
C) short repeats may fold back upon themselves to form a double-stranded structure that is not easily sequenced.
D) the long repeats often have mutations that are not easily sequenced.
E) All of these choices are correct.