Terrance, whose birth mother drank heavily throughout pregnancy, has a thin upper lip, short eyelid openings, a small head, and a smooth philtrum. his physical growth has been slow, and he shows impairment in memory, attention span, motor coordination, and social skills. terrance has
a. partial fetal alcohol syndrome
b. alcohol-related neurodevelopmental disorder
c. fetal alcohol syndrome
d. cytomegalovirus

c. fetal alcohol syndrome

Explanation:

Fetal alcohol syndrome is the disorder that occurs in children who are exposed to alcohol during embryonic development due to alcohol consumption by their mothers.  

Fetal alcohol syndrome is characterized by stunted growth of child and problems associated with the nervous system. Impaired neurological development makes these children slow learners and affects their motor skills.  

Terrance's mother also consumed alcohol during pregnancy and exposed him to alcohol. His alcohol exposure resulted in fetal alcohol syndrome affecting his growth and mental development. Fetal alcohol syndrome also affects the shape and size of facial parts such as lips, eyelids, and head as exhibited by Terrance.  

"do a testcross with a homozygous recessive plant."