Step 1: Understand the evolution of financial management.
The traditional approach to financial management focused primarily on maintaining a stable financial position and operations, with less emphasis on planning, forecasting, or investment. This approach became less effective as business complexity grew.
Step 2: Evaluate the options.
- Financial management evolved in the early 20th century, with more modern techniques replacing traditional methods in the 1930s, particularly as industries grew and became more complex.
- The traditional approach was largely discarded in the 1930-40s, when more structured and strategic financial management approaches were adopted.
Step 3: Conclude.
The correct time period when the traditional approach was discarded is 1930-40.
Final Answer:
\[
\boxed{\text{1930-40}}
\]