The Following Questions Refer to the Excerpt Below

The following questions refer to the excerpt below.
"And yet again,in his message of December 7,1847,that "the Mexican Government refused even to hear the terms of adjustment which he [our minister of peace] was authorized to propose,and finally,under wholly unjustifiable pretexts,involved the two countries in war,by invading the territory of the State of Texas,striking the first blow,and shedding the blood of our citizens on our own soil."  And whereas this House is desirous to obtain a full knowledge of all the facts which go to establish whether the particular spot on which the blood of our citizens was so shed was or was not at that time our own soil:"
Abraham Lincoln,1848
-In the excerpt,Lincoln was demanding to know

A) if the United States and Mexico should join together to fight Britain.
B) if the United States should aid Mexico in fighting its revolution for independence against Spain.
C) if the South had the right to secede.
D) if American troops were attacked by the Mexican army in United States territory.