Here's a problem to solve: A cleft chin in humans is coded by the dominant allele C. A chin without a cleft is coded by the recessive allele c. A man with a cc allele combination for the trait produces a zygote with a woman with a Cc allele combination for the trait. Which allele combinations could occur in the zygote?

Among the 4 following options, which is the correct answer?

- A: Cc or cc
 
- B: CC or Cc
 
- C: CC only
 
- D: Cc only
 