What gave a sense of urgency to the Constitutional Convention of 1836?

a.the presence of Santa Anna's army
b.U.S. interest in the annexation of Texas
c.disagreements over slavery in Texas
d.unfair British taxes and and tariffs on imports

3 answers

I'll be glad to check your answer.

http://www.lsjunction.com/events/conv1836.htm
Is it A?
yes