Dr Khoza Was Interested in the Topic of Autistic Savants

Dr Khoza was interested in the topic of autistic savants (individuals with limited abilities in many areas, but with an exceptional talent in one specific area) . In the initial part of the investigation Dr Khoza carefully observed and compiled detailed files on three individuals who were autistic savants. Dr Khoza is conducting

A) case study research.
B) survey research.
C) correlational research.
D) experimental research.