What happens when there are multiple return statements in a function?

The program ends when the first $`$return$`$ statement is reached.

The function ends when the first $`$return$`$ statement is reached.

An error will occur, because you cannot have more than one $`$return$`$ statement.

The last $`$return$`$ statement will be used to determine the returned value.

All the values from all the $`$return$`$ statements will be combined using the type rules.

The $`$return$`$ statements must be placed under other control structures like $`$if$`$ statements, or the other $`$return$`$ statements will not be reachable.