Table: governor_changes
Columns: state_class
vacator
reason_for_change
successor
date_of_successors_formal_installation

Question: Why did the change happened in Massachusetts (2)?
SQL: SELECT "reason_for_change" FROM governor_changes WHERE "state_class" = 'Massachusetts (2)'

Question: How many different reasons are there for the change in Connecticut (3)?
SQL: SELECT COUNT("reason_for_change") FROM governor_changes WHERE "state_class" = 'Connecticut (3)'