Who was sent to mexico to negotiate the rio grande as the border of texas.

treaty that ended the Mexican War and made boundaries of Texas and gave the USA California. he was sent to Mexico, by James K Polk, to negotiate an agreement whereby the Rio Grande would be the southern border of Texas.

the right answer is d) a conference committee. it is a temporary panel formed by house and senate members in order to reconcile differences in legislation.

so, based on the research i've done. the u.s. government were always on a wild goose chase just to take down castro. he then retired his trone to his brother raul in 2008 due to some health issues. so it's obvious your answer would be:

castro had no allies from which he could receive aid.

hope this and have a fantastic day!

                                                    -wolfiewolffromsketch