Concept:
Deductive reasoning moves from general theory to specific conclusions through systematic research steps.
Step 1:
Research begins with already established theories and concepts.
\[
D \text{ comes first}
\]
Step 2:
Researchers then identify unanswered questions or gaps in existing knowledge.
\[
E \text{ comes after D}
\]
Step 3:
Based on the gaps, hypotheses and research questions are developed.
\[
C \text{ comes after E}
\]
Step 4:
Researchers gather relevant data to test the hypotheses.
\[
B \text{ comes after C}
\]
Step 5:
After analysis of data, researchers draw specific conclusions.
\[
A \text{ comes last}
\]
\[
\boxed{\text{(1) D-E-C-B-A}}
\]