If Someone Is Said to Be "Heterozygous" for a Trait,it

Multiple Choice

If someone is said to be "heterozygous" for a trait,it means that

A) both alleles for that trait are the same.
B) both alleles for that trait are different.
C) the alleles for that trait reside at different places on the same chromosome.
D) the alleles for that trait reside on different chromosomes.
E) the person only carries one,not two,alleles.