Question

why did the us congress reject texas petition to be annexed (added) to the union? the us was getting too big to govern. the us wanted england to have texas as a gift. the us was afraid of adding another slave state c

Explanation:

During the era of Texas' annexation petition, the main political tension was over slavery. The US Congress was concerned about the balance between slave and free states. Adding Texas (a slave - holding region) would disrupt this balance, which is why they rejected the petition initially. The first option ("The US was getting too big to govern") is not a valid reason as the US was expanding and had mechanisms for governance. The second option ("The US wanted England to have Texas as a gift") is illogical as the US had interests in Texas. The third option (partially visible but likely "The US was afraid of adding another slave state") aligns with the historical context of the slavery - related state balance issue.

Answer:

The US was afraid of adding another slave state (assuming the third option is fully "The US was afraid of adding another slave state" as it aligns with historical reasons of preserving slave - free state balance during that period, while the other options are illogical: the US was expanding and had governance systems, and there was no reason to give Texas to England).