34. Powered lifts for indoor use run on battery power to __ a. keep them small enough to fit through doorways b. avoid the need for long extension cords c. eliminate exhaust fumes d. lower noise levels inside the building

## Step 1<br />The problem is asking us to identify the reason why powered lifts for indoor use run on battery power. The options provided are:<br />a. to keep them small enough to fit through doorways<br />b. to avoid the need for long extension cords<br />c. to eliminate exhaust fumes<br />d. to lower noise levels inside the building<br /><br />## Step 2<br />We need to consider the context of the problem, which is about powered lifts for indoor use. The primary concern in this context is the environmental impact of exhaust fumes, which are typically associated with powered machinery.<br /><br />## Step 3<br />By using battery power, these lifts can operate without producing exhaust fumes, which is a significant advantage in indoor environments where air quality is a concern.