Answer:
B. Mexican government feared Texas settlers were taking over Texas
Explanation:
The main impact the 1826 Fredonian Rebellion have on the Mexico/Texas relations is that Mexican government feared Texas settlers were taking over Texas. Fredonian Rebellion confirmed the fears of Mexican government officials that Americans were trying to take Texas from Mexico so for that they sent Mexican soldiers and militia from Austin's Colony in order to dissolve the revolt.
<span>First Transcontinental Railroad -
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Here's a link that should give you all of the information you need about the transcontinental railroad.</span>
The Answer Should Be : <span>D) Enforcing Immigration Laws</span>