A 9-year old has tooth 1.1 completely erupted and tooth 2.1 is unerupted. The radiographs reveal a palatally located mesiodens. The preferred treatment would be

extract the mesiodens and allow passive eruption of the 2.1.

observation and continued monitoring.

allow the mesiodens to erupt into the arch and then extract it.

extract the mesiodens and orthodontically extrude the 2.1.