Higher oxidation state of manganese in fluoride is `+4 (MnF_(4))` but highest oxidation state in oxides is `+7(Mn_(2)O_(7))` because
A. fluorine is more electronegative than oxygen
B. fluorine does not possess d-orbitals
C. fluorine stabilises lower oxidation state
D. in covalent compounds, fluorine can form single bond only while oxygen forms double bond.
