A 1-year-old boy presents with the complaint from his parents of not developing normally. He was the product of an uneventful term pregnancy and delivery, and reportedly was normal at birth. His previous health-care provider noted his developmental delay, and also noted that the child seemed to have an enlarged spleen and liver. On your examination, you confirm the developmental delay and the hepatosplenomegaly, and also notice that the child has short stature, macrocephaly, hirsutism, a coarse facies, and decreased joint mobility. Which of the following is the most likely etiology of his condition?
a) Hunter syndrome
b) Hurler syndrome
c) Gaucher disease
d) Niemann-Pick disease