Evaluate the following statement: $"$If a long trench in Class C soil is properly sloped or benched according to OSHA standards on the long sides, it doesn't need to be sloped on the short sides."

Incorrect$--$ appropriate sloping must always be used on all sides of a trench in Class C soil due to its instability.

Correct$--$ appropriate slopes are only required on the long sides as the short sides are not at risk of collapse owing to the physics of trench geometry.

Incorrect$--$ both long and short edges of trenches always need to be benched, regardless of soil type.

Correct$--$ the short sides do not need to be sloped or benched unless site$-$specific conditions suggest that they should be$.$