When the Fluoride Ion Reacts with a BF₃ Molecule (A

When the fluoride ion reacts with a BF₃ molecule (a molecule in which there are no multiple bonds) , an ion is formed in which the boron atom is the central atom. The bond between the boron trifluoride and the fluoride ion is

A) an ionic bond.
B) a regular covalent bond, where both species contribute 1 electron to the bond.
C) a coordinate covalent bond.
D) a resonance hybrid bond.
E) a bond where two atoms share one electron instead of two.