60. bose-einstein condensation temperature t refers to the temperature below which (a) an assembly of bose gas condenses to the liquid state (b) there is an app

60. Bose-Einstein condensation temperature T refers to the temperature below which (A) An assembly of Bose gas condenses to the liquid state (B) There is an appreciable occupation of the ground state in an electron system (C) There is a significantly large occupancy of the ground state in a system of bosons (D) The bosons essentially behave like fermions