What does “evel-luffing” accomplish during crane operations（）.<br>A:It prevents the load from swinging when the boom level is adjusted<br>B:Less power is needed when topping the boom with a load on the hook<br>C:It maintains the height of the load above the deck<br>D:All of the above

What does “evel-luffing” accomplish during crane operations（）.
A:It prevents the load from swinging when the boom level is adjusted
B:Less power is needed when topping the boom with a load on the hook
C:It maintains the height of the load above the deck
D:All of the above

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