The main reason for larger number of oxidation state exhibited by the actinides than the corresponding lanthanides, is
A. more energy ifference between 5f and 6d orbitals than 4f and 5d orbitals
B. less energy difference between 5t and 6d orbitals than 4f and 5d orbitals
C. larger atomic size of actinides
D. more reactive nature of actinides than lanthanides
