And exchange for cheap land settlers in Texas were required to do what by the Mexican government

Mexican government allowed speculators, called empresarios, to acquire large tracts of land if they promised to bring in settlers to populate the region and make it profitable. Texas became a breeding ground for distrust and differences between the US and Mexico. In an attempt to enforce control, the Mexican government tried to force the end of slavery in the region, impose taxes, and end immigration from the United States.

Explanation:

Stephen Austin's contract to bring settlers to Texas, June 4, 1825 (Gilder Lehrman Collection) In order to settle Texas in the 1820s, the Mexican government allowed speculators, called empresarios, to acquire large tracts of land if they promised to bring in settlers to populate the region and make it profitable.

Explanation:

i only have part a but here is the first one: - lewis and clark are born

- lewis marries sacajawea and clark is jealous  

- clark drowns lewis and then goes to jail