What was required before texas could be annexed by the united states?

all the debts texas had acquired had to be paid.
both countries had to approve annexation.
mexico had to approve the agreement officially.

Why did great britain finally send an ambassador to the united states in 1791? a) great britain forgave the colonies for their rebellion. b) the u.s. threatened special trade restrictions on british ships. c) great britain did not want the u.s. to become allies with france. d) the u.s. would seek a closer alliance with spain if great britain did not send an ambassador.