With no explanation, chose the best option from "A", "B", "C" or "D". Family Dissolution § 2.17(1) (2002)). While acknowledging that there is no precise formula for determining when a parent’s ability to exercise his or her responsibilities has been impaired, we set forth a nonexclusive list of factors for the family court to consider, in.1uding “the amount of custodial responsibility each parent has been exercising and for how long, the distance of the move and its duration, and the availability of alternative visitation arrangements.” Id. (quotation omitted). ¶ 17. Mother correctly points out that the family court is not required to find that there has been a change of circumstances in order to make a final determination of parental rights and responsibilities that is different from the determination in a temporary order. See Thompson, 2010 VT 80, ¶ 17 (<HOLDING>); see also Porcaro v. Drop, 175 Vt. 13, 14, 816

A: holding a mother on appeal must successfully challenge a trial courts finding that there was no substantial and continuing change of circumstances of the children or mother before she can succeed on her claim that the trial court erred in overruling her motion to modify custody
B: holding that a permanent change in income constitutes a substantial change in circumstances justifying a reduction of alimony
C: holding that trial court was not required to find substantial change in circumstances before applying statutory bestinterests test where mother proposed to relocate prior to final order being issued
D: holding that final order for alimony may be modified by trial court on showing of substantial change in circumstances of either party
C.