question 8/25 which is true of mobile ladder locking mechanisms select the best answer: may be spring loaded…

question 8/25 which is true of mobile ladder locking mechanisms select the best answer: may be spring loaded may require manual activation must be properly engaged before use all of the above none of the above
Answer
Brief Explanations:
Mobile ladder locking mechanisms can be spring - loaded, may require manual activation, and must be properly engaged before use for safety.
Answer:
D. All of the above