Myc activates the synthesis of cyclin D and SCF subunit, which both contribute to inhibiting Rb (an inhibitor of cell cycle progression). It also produces E2F, which promotes entry into S phase.

A) Myc inhibits cyclin D synthesis.
B) Rb promotes cell cycle progression.
C) Myc has no effect on the cell cycle.
D) Myc contributes to Rb inhibition and E2F production.