After an amniocentesis, a 29-year-old woman who is carrying twins learns that one fetus has XY chromosomes and the other has XX chromosomes. At 37 weeks' gestation, the female delivers 2 healthy babies. Which of the following structures is likely to be present in the baby with the XY chromosomes but not in the one with the XX chromosomes?

1. A)Membranous urethra
2. B)Bulbourethral glandGABARITO
3. C)Bulbospongiosus muscle
4. D)Corpus cavernosum
5. E)Perineal body