Which problem can be solved using this inequality?

3x - 7 ≥ 20

A) Three times a number x less seven is less than twenty. Solve for x.
B) Three times a number x less seven is less than or equal to twenty. Solve for x.
C) Three times a number x less seven is greater than or equal to twenty. Solve for x.
D) Three times the difference of a number x and seven is greater than or equal to twenty. Solve for x.