Which of the following sling angle ranges is best for lifting without making the lift extremely dangerous?

The range of 45 degrees to 90 degrees is optimal for lifting because it provides a good balance between load stability and sling tension. In this range, the sling forms an angle that allows for better weight distribution and reduces the chances of the load swaying or shifting during the lift.

When the angle is too low, as in the first option, the load can create excessive tension on the sling. This increases the risk of the sling failing under weight due to the high forces being exerted. Conversely, if the angle is too high, as in the last two options, the load's stability decreases, and the risk of tipping increases, which can lead to dangerous situations during lifting.

Therefore, the 45 degrees to 90 degrees range is where the lifting apparatus is most effective and safe, providing adequate support and reducing the risk of accidents during the lifting process.