Why was the union interested in blocking and capturing the port of galveston? a. the union wanted to harm the southern economy by upsetting the cotton trade. b. the union planned to use the city as a base to launch attacks on houston, a larger city. c. galveston was home to many texans who supported the northern cause d. galveston has many factories that developed weapons used by confederate troop.

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?