Step 1: Understanding the Concept:
The question refers to the most severe worldwide economic downturn of the 20th century, widely known as the Great Depression.
Step 2: Detailed Explanation:
The Great Depression was a global economic crisis that began with the Wall Street stock market crash in the United States in October 1929. The crash signaled the beginning of a decade-long period of high unemployment, poverty, low profits, deflation, and falling trade. The period 1929-1930 marks the onset of this catastrophic event. The other periods listed are associated with different economic events, but not the Great Depression.
Step 3: Final Answer:
The Global Economic Depression, or the Great Depression, began in 1929. Therefore, the period 1929-1930 correctly identifies its start. Option (A) is correct.
Mention the events related to the following historical dates:
\[\begin{array}{rl} \bullet & 321 \,\text{B.C.} \\ \bullet & 1829 \,\text{A.D.} \\ \bullet & 973 \,\text{A.D.} \\ \bullet & 1336 \,\text{A.D.} \\ \bullet & 1605 \,\text{A.D.} \\ \bullet & 1875 \,\text{A.D.} \\ \bullet & 1885 \,\text{A.D.} \\ \bullet & 1907 \,\text{A.D.} \\ \bullet & 1942 \,\text{A.D.} \\ \bullet & 1935 \,\text{A.D.} \end{array}\]