The table below describes political party associations of governors based on the table, what has been an impact of political parties on policy making?

a) more democratic issue positions

b) the number of republicans nominated for governor increased

c) the number of democrats nominated for governor increased

d) more republican issues positions have shaped federal policy

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

"harry t. moore (1905-1951) – civil rights activist, leader, and the first martyr of the civil rights movement. fannie lou hamer (1917–1977) – leader in the american civil rights movement; co-founder of the national women's political caucus and freedom democratic party. james farmer (1920–1999) – congress of racial equality."

answer; self_ disclosure;

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explanation: