A researcher observes the behavior of a special needs student in a classroom setting for three days with his primary teacher, then for three days with a substitute teacher, and again three days with his primary teacher. The researcher expects that the level of outbursts will change when the substitute teacher is present. What type of single case design is described in this example

The platt amendment of 1901 forbade cuba from entering into any treaties that would allow undue foreign involvement in cuban affairs. this law was passed after the spanish-american war to make sure that european nations weren’t going to get involved with cuba. 1, why might the platt amendment be considered ironic? 2, what reasons would the united states have for not wanting european influence in cuba?