The attempt to build a different personality/self :-)
Answer: Experimental
Explanation:
An experimental research would be needed to prove if the hypothesis that "the presence of certain odors causes people to gamble more" is correct or not.
An experiment is a process carried out in a scientific method to prove if a hypothesis is correct or not.
Answer:
Number 3 is removing southern power. (B)
Number 4 is Lincoln's assasination. (B)
