Answer:
Option A. Based on the information presented in the question, the term microcephaly most likely means to be dull or unintelligent.
Step-by-step explanation:
The microcephaly is composed of two different terms: micro, which means of small size, and cephaly which is derived from the word cephaly which is the Latin for head/skull. In medicine the term microcephaly is a condition in which the head's circumference is smaller than usual. People that suffer from this condition tend to have intellectual disability, and that is why the term is associated with being dull or unintelligent.