Historians don't know exactly how many people worked for the Underground Railroad. Whicl of the following factors would make it hard for historians to estimate the number of members? Select all that apply. There were too many workers to count, since nearly all Northerners were members. There weren't many lists of members, since lists could help slave-catchers find escapees. Helping enslaved people escape was illegal, so members wanted to hide their involvement. Almost all records from life in the 1800 s have been destroyed over time.

To determine which factors would make it hard for historians to estimate the number of members of the Underground Railroad, let's analyze each option: 1. **There were too many workers to count, since nearly all Northerners were members.** - This statement suggests that the sheer number of participants complicates estimation. If a large portion of the population was involved, it would indeed be difficult to quantify membership accurately. 2. **There weren't many lists of members, since lists could help slave-catchers find escapees.** - This factor indicates a lack of documentation, which would hinder historians' ability to track and estimate the number of members. The absence of lists means there is less concrete evidence to rely on. 3. **Helping enslaved people escape was illegal, so members wanted to hide their involvement.** - This factor highlights the secretive nature of the Underground Railroad. If members were trying to conceal their involvement, it would lead to fewer records and testimonies, making it difficult for historians to estimate membership. 4. **Almost all records from life in the 1800s have been destroyed over time.** - This statement points to the loss of historical documentation, which would significantly impact historians' ability to gather information about the Underground Railroad and its members. Based on this analysis, the factors that would make it hard for historians to estimate the number of members of the Underground Railroad are: - There were too many workers to count, since nearly all Northerners were members. - There weren't many lists of members, since lists could help slave-catchers find escapees. - Helping enslaved people escape was illegal, so members wanted to hide their involvement. - Almost all records from life in the 1800s have been destroyed over time. All four factors contribute to the difficulty in estimating the number of members.