The emergence of opposing political parties in the United States was influenced by several factors from your list. The correct choices are:
- **Increase in the distribution of newspapers**: This played a significant role in shaping public opinion and facilitating political debate, contributing to the formation of political parties.
- **Differences in opinion on how much power federal government should have**: This was a fundamental issue that divided early political thinkers, leading to the formation of parties such as the Federalists and Democratic-Republicans.
- **Looming threat of war with France**: The tensions and foreign policy disagreements related to France influenced political alignments and party formation, particularly during the late 18th century.
The option regarding "mounting pressure from Britain to further establish government" is less directly related to the emergence of parties. Thus, the applicable choices are:
1. Increase in the distribution of newspapers
2. Differences in opinion on how much power federal government should have
3. Looming threat of war with France