A. The trait for the disease is recessive, and each offspring had a 50% chance of receiving the recessive allele and developing the disease.

B. The trait for the disease is dominant, and each offspring had a 50% chance of receiving the dominant allele and developing the disease.

C. The trait for the disease is dominant, and all offspring had a 100% chance of receiving the dominant allele and developing the disease.

D. The trait for the disease is recessive, and all offspring had a 100% chance of receiving the recessive allele and developing the disease.