African American troops in the Union army:

A.were from the begining an itergral part of mnay fighting units.
B.distinguished themeselves in battles in Louisiana.
C. None of these

I read first. And I came up with B. is this right.

Yes, B is right. :-)

Thank you very much Ms. Sue for your help. =)

You're very welcome, Jay.

To determine the correct answer, let's analyze the information provided in the question: "African American troops in the Union army were from the beginning an integral part of many fighting units" and "They distinguished themselves in battles in Louisiana."

From this information, it is clear that both statements A and B are correct. African American troops were indeed an integral part of many fighting units from the beginning, and they also distinguished themselves in battles in Louisiana.

Therefore, the correct answer is: A. were from the beginning an integral part of many fighting units and B. distinguished themselves in battles in Louisiana.