They are preserve a dead body so they're happy
Answer: Double-blind experiment.
Explanation:
Double blind experiment is study in which participants and experiments do not have any idea about which participant or person will be going through treatment of experiment.This process in followed is experimentation to extract unbiased results.
According to the question,researcher is conducting double-blind experiment in which he does not know who will receive the treatment in experiment and neither students are aware about it.Also, their scores and names are not concealed.
By defending their rights and liberties, amendments have influenced Americans' engagement in governance.
The fact that African Americans now have equal rights to white people has an impact on us. For instance, the nineteenth amendment grants the right to vote to those who are 18 years old and to African-American men. With the passage of this amendment, slavery will never occur again in our nation.
We as Americans today have been impacted by the 13th, 14th, 15th, and 19th amendments. The modifications are as follows:
13th: Slavery was abolished in the United States.
14th: All American citizens were given legal protection.
15th: Male African Americans received the right to vote.
19th: women received the right to vote.
Therefore, this is how the amendments affected American participation.
Learn more about American amendments here:
brainly.com/question/1082070
#SPJ4
