The gene E controlling double eyelids is dominant to the gene E controlling single eyelids. Li Hong is a double eyelid, and its somatic cells control the double eyelids.
If the gene (b) that determines the double eyelid is dominant to the gene (b) that determines the single eyelid, the gene composition of the double eyelid is Bb or BB, and the gene composition of the single eyelid is BB. Therefore, "Li Hong is a double eyelid", and the genetic composition in her somatic cells may be BB or BB.
Therefore, choose: d.