When considering implants, which of the following statements is incorrect?
A. With immediate implant placement, fixture should engage at least 5 mm of bone apically for primary stability
B. Progressive loading is placement of a final prosthesis under immediate loading
C. With immediate placement, the critical space between the platform and extraction socket should be < 2 mm and grafting is considered if > 1 mm
D. Flatter incline planes and narrower occlusal tables create more vertical forces and a shorter moment arm