# Step-by-Step Solution ## 1. Understanding the Question We are asked: **What is important when setting up a crane on a worksite?** Several options are given, each listing two factors. Let’s analyze the requirements for safe crane setup. --- ## 2. Analyzing Each Option ### (a) Stable and level ground - **Stable ground:** Prevents the crane from sinking or tipping. - **Level ground:** Ensures the crane remains upright and balanced. - **Both are critical for crane safety.** ### (b) Clear sight lines and adequate space - **Clear sight lines:** Operator must see the load and surroundings for safety. - **Adequate space:** The crane needs enough area to maneuver. - **Both helpful, especially for operation, but not the most fundamental for setup.** ### (c) Stable ground and clear sight lines - **Stable ground:** Critical for setup. - **Clear sight lines:** Important during operation, not as critical during setup. ### (d) Stable ground and adequate space - **Stable ground:** Essential for setup. - **Adequate space:** Needed to assemble and operate the crane safely. --- ## 3. What is Most Important for Setup? - The **most fundamental requirement when setting up** is ensuring the crane is on **stable and level ground**. This prevents tipping and accidents. - Other factors (space, sight lines) matter for safe operation, but not as much for initial setup. --- ## 4. Selecting the Best Option **Option (a): Stable and level ground** - This directly addresses the most important aspect of the crane setup. --- # Final Answer **The most important factor when setting up a crane on a worksite is:** > **(a) Stable and level ground** This ensures the crane can be set up safely and operate without risk of tipping or collapse.