Context: This passage describes the ear type trait in rats:

In a group of rats, some individuals have normal ears and others have dumbo ears. In this group, the gene for the ear type trait has two alleles. The allele for normal ears (E) is dominant over the allele for dumbo ears (e).
Muffin is a rat from this group. Muffin has the heterozygous genotype Ee for the ear type gene.
Based on this information, what is Muffin's phenotype for the ear type trait?
A. dumbo ears
B. normal ears
Answer with the option's letter from the given choices directly.

B