Multi-select problem: How does the next paragraph end?

A rubiks cube sits on a laptop as a clock counts down. the clock

Available choices:
(a). stops counting down and a boy lifts the cube, meets it, and hands it to a session partner..
(b). stops and the number transforms into numbers..
(c). strikes 0 and a person picks up the cube..
(d). finally stops and the man stands up to pull out more disks..
(c).