An Education Researcher Was Interested in Examining the Effect of the Teaching

An education researcher was interested in examining the effect of the teaching method and the effect of the particular teacher on students' scores on a reading test.In a study, there are
Four different teachers (Juliana, Felix, Sonia, and Helen) and three different teaching methods
(method A, method B, and method C) .The number of students participating in the study is 258.Students are randomly assigned to a teaching method and teacher.Identify the response
Variable measured.

A) Teaching method
B) The education researcher
C) Score on reading test
D) Method A, method B, method C