Answer:
New federal food safety laws were created.
Explanation:
The Jungle exposed the meat packing industry which shocked many.
Based on the graph attached below, we can observe there is a sharp increase from the 1850s. The reason behind that increase is the Act of Consolidation in 1854, which the borders until that time expanded and resulted with the modern borders of Philadelphia. Indeed, the correct answer is an increase in the number of housing unit.
The answer is China and Turkey, Because they were the two closest Countries that the Mongol armies conquered and invaded.
Life working between the 1880's and 1920's it was rough, due to the fact that there were few to no laws prohibiting manufacturing and the companies could work the workers "( to death )".