Answer:
c. A prospective change from the current year through the remainder of its useful life, using the new estimates.
Explanation:
The company will recalculate the new depreciation expense for the equipment consider the new information available.
That is a prospective change, from this accountign period and forwards. The prior years depreciation expense and therefore, net income will not change.
That could only occur if we change the method of depreciation.
We aren't changin the method, we just acquire new information which wasn't available in other period so we don't adjust them.