Face reveal might get deleted

Ben is interested in using a source that provides original research, current and developing trends and experts within specific fields. which source should he use?

If inflation is 6% and nominal gdp grew by 4%, then during the same period real gdp changed by a) -2% b) 2% c) 4% d) 5%

Scientists observed a rock stratum with fossil. if mollusks evolved before arthropod, where will their fossils be found.