In an Experimental Research Design, the Research Hypothesis Is That

In an experimental research design, the research hypothesis is that

A) the participants in the different conditions will show different responses to the dependent variable.
B) the participants in any one condition will show the same responses to the dependent variable.
C) the independent variable will produce a significant impact on the experimental manipulation.
D) the means on the dependent variable will be different in the different levels of the independent variable.