Concept:Slatted floors have gaps that allow animal waste to pass through, which affects cleaning, smell, and animal safety.
Explanation:Slatted floors greatly reduce the amount of manure that remains in the pen.
When waste falls through the gaps, less manual cleaning is required.
So statement I is true because labour requirements are lessened.
Since dung and urine are quickly removed from the surface, the pens stay drier and less smelly.
So statement II is true because odour in the pens is reduced.
If the slats are badly spaced or uneven, animals may slip or injure their feet.
This makes it harder for livestock to walk and move about freely.
So statement III is also true.
Therefore, all three statements are correct, making option D the right choice.
Answer:D. I, II and III