What is the mass range of super-Earth planets?

A) Less than 1 M�
B) Between 1.2 M� and approximately 5 M�
C) Between 1.2 M� and approximately 25 M�
D) Between 15 M� and approximately 25 M�

I thought it would have been like: Between 1.2M and approximately 15M, but I don't see that option. What could it be?