Step 1:
The first step is identifying and classifying all producing enterprises.
\[
D = \text{First Step}
\]
Step 2:
Different factor incomes like wages, rent, interest, and profit are classified.
\[
B = \text{Second Step}
\]
Step 3:
After classification, domestic income is estimated.
\[
C = \text{Third Step}
\]
Step 4:
Net Factor Income from Abroad is added to domestic income to estimate national income.
Correct sequence:
\[
D,\; B,\; C,\; A,\; E
\]
Hence, the correct answer is:
\[
\boxed{\text{(4) D, B, C, A, E}}
\]