When comparing the units$-$of$-$output method of depreciation with straight$-$line depreciation, the depreciation expense in the first year:

will always be greater under units$-$ol$-$output method.

will always be less under the units$-$of$-$output method.

will always be the same under both the methods.

may be greater than, equal to$,$ or less under the units$-$of$-$output method.