Which is correct among following concepts( )
选项：

A:The induction electric field is also conservation field.
B:The electric field lines of the induction electric field are a group of closed curves.
C:Ф_{m=LI, since the coefficient of self induction of a coil is proportional to the current in the circuit loop.}
D:Ф_{m=LI, the bigger the magnetic field flux of a circuit loop, the larger the coefficient of self induction of the circuit loop.}