Floyd Allport Made All of the Following Contributions to the Establishment

Floyd Allport made all of the following contributions to the establishment of social psychology except:

A) he completed the first PhD dissertation on an experimental social psychology topic.
B) he co-edited The Journal of Abnormal Psychology and added Social Psychology to its title and subject matter.
C) he wrote the first textbook devoted to experimental social psychology.
D) he created the first social psychology laboratory at Harvard University.