Answer:
The UFOs
Explanation:
This person is saying that it either had to be hallucinogens or the UFOs which is false, because it could of been a number of things, ie. Comets, planes, helicopters, rockets taking off.
It cost 15million. and he was the president that time
Maybe the answer would in independents? because i know that political parties cannot run in Cuba
Answer: selection-attrition threat
Explanation: this kind of threat is mostly based on the theory or likelihood that some people will readily drop out or quit an experimental research early or quickly than others participating in the same experiment. It is normally called an internal validity test. In this kind of situation, it alters or has an effect on the validity of an experiment. Most times, lack of motivation or motivational words and also sickness can make some to stop his or her participation in a psychological experiment. Several different reasons also may be the cause of the drop out. It is the likelihood and not certain there must be a falling out of a person in the experiment.
