What is the standard of review for awarding custody of a child to the sole parent of the child?

There are two aspects to the standard of review we must apply in this case. An award of custody is addressed to the sound discretion of the trial court, and we review the exercise of that discretion for an abuse of discretion. (In re Marriage of Russo (1971) 21 Cal.App.3d 72, 86.) A trial court abuses its discretion when it acts in an arbitrary, capricious, or patently absurd manner. (People v. Peoples (2016) 62 Cal.4th 718, 745.)