Could the Characteristics Followed in the Pedigree Be Caused by an X-Linked

Multiple Choice

Could the characteristics followed in the pedigree be caused by an X-linked recessive allele?

A) Yes, all individuals fit the X-linked recessive inheritance pattern.
B) No, the offspring of I-1 and I-2 contradict an X-linked recessive inheritance.
C) No, the offspring of I-3 and I-4 contradict an X-linked recessive inheritance.
D) No, the offspring of II-3 and II-4 contradict an X-linked recessive inheritance.
E) Possibly, but I-4 would have to be a heterozygous carrier if there is X-linked inheritance.