Correct Answer:
A. a. 1930
Without further context for the question, 1930 is presented as the correct answer. Options B, C, and D are incorrect as per the provided solution, indicating they do not fit the unstated criteria.
Without further context for the question, 1930 is presented as the correct answer. Options B, C, and D are incorrect as per the provided solution, indicating they do not fit the unstated criteria.