$A$ coil is placed in a magnetic field such that the plane of the coil is perpendicular to the direction of the magnetic field. The magnetic flux $\phi$ through the coil can be changed by:
$(A)$ Changing the magnitude of the magnetic field $B$.
$(B)$ Changing the area of the coil $A$.
$(C)$ Changing the angle $\theta$ between the magnetic field and the plane of the coil.
$(D)$ Reversing the direction of the magnetic field.

• A
  $(A)$ and $(B)$ only
• B
  $(A)$, $(B)$ and $(C)$ only
• C
  $(A)$, $(B)$ and $(D)$ only
• D
  $(A)$, $(B)$, $(C)$ and $(D)$