Final answer:
The historical facts missing from the passage 'April Fools' Day, 1908' about Lola Greene Baldwin are her early life and family background, as well as her experiences in other professions before becoming a policewoman. These details are crucial for a complete understanding of her influence on law enforcement.
Step-by-step explanation:
Based on the passages provided, it seems that two historical facts about Lola Greene Baldwin are missing from the passage entitled April Fools' Day, 1908. The first missing detail is Option 2: Her early life and family background.
This information is essential to understanding the context of Baldwin's accomplishments and how her upbringing may have influenced her career path.
The second missing fact falls under Option 4: Her experiences in other professions before becoming a policewoman. Such experiences could shed light on the skills and perspectives she brought to her pioneering role in law enforcement.
Without inclusion of these two historical aspects, the picture of Baldwin's life is incomplete.
To gain a comprehensive understanding of her impact on law enforcement, one must also consider her personal history and career developments prior to her noteworthy achievement on April Fools' Day, 1908, when she was sworn in as the first female police officer in the United States, which seems to be the main focus of the second passage.