For This Problem,you May Want to Create a Punnett Square

Multiple Choice

For this problem,you may want to create a Punnett Square on a separate piece of paper.Manuel has both cystic fibrosis,a recessive disorder,and sickle cell anemia which is also a recessive disorder.Manuel's partner,Lucretia,is normal for both conditions.What is the probability that Manuel and Lucretia will have a normal child without either of the conditions Manuel has?  

A) 0%
B) 25%
C) 75%
D) 100%
E) It is not possible to solve this problem with the information provided.