Who was Squanto? A. a Pequot Indian who fought New England colonists
B. a Pequot Indian who taught colonists how to survive
C. a representative of the Wampanoag Indians who refused to recognize the colonists
D. a representative of the Wampanoag Indians who negotiated peace with the colonists

the answer is B

Explanation:

"a Pequot Indian who taught colonists how to survive"

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.