Why Was Fechner Important in the Development of a Scientific,experimental

Multiple Choice

Why was Fechner important in the development of a scientific,experimental psychology?

A) He was among the first to demonstrate how reaction-time experiments could be of significance to psychology.
B) He was among the first to demonstrate how memory could be studied quantitatively.
C) He was among the first to demonstrate how the Gestalt theories of figure and ground could be quantified.
D) He was among the first to demonstrate how a psychological phenomenon could be measured and quantified, and shown to relate lawfully to other variables.