[" 15.Consider the following statements."],[" A.An emf can be induced by moving a conductor in a "],[" magnetic field."],[" B.An emf can be induced by changing the magnetic field."],[[" (a) Both "A" and "B" are true "," (b) "A" is true but "B" is false "],[" (c) "B" is true but "A" is false "," (d) Both "A" and "B" are false "]]