3. the Customary marriage requires the consent of​

The requirements are as follows: The marriage must be negotiated, entered into or celebrated in accordance with customary law. ... If one or more of the parties are minors (below the age of 18 years), both his/her parents or legal guardian must give consent to the marriage.

Explanation:

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.        

answer; the edward snowden leaks of nsa classified material;