The progression of the cell cycle is under the control of

The correct option is C cyclin-CDK complexes
During the cell cycle, two groups of proteins, called cyclins and cyclin-dependent kinases (Cdks), are responsible for the progression of the cell through the various checkpoints. Cyclins regulate the cell cycle only when they are tightly bound to Cdks. They both form cyclin-CDK complexes.

So, the correct option is 'cyclin-CDK complexes'.