In Cell Division, the 'Start' Point Defines the Point at Which

In cell division, the 'Start' point defines the point at which the cell commits to progression through the cell cycle. Which of the following are true about the Start point?

A) It occurs at the beginning of S phase when DNA synthesis commences.
B) It is the point in the cell cycle when the MPF complex accumulates.
C) It is the point in anaphase when the sister chromatids separate from each other.
D) It signals the commencement of Meiosis II.
E) It is the point when a cyclin-dependent kinase binds to a cyclin and the complex activates genes required for DNA synthesis.