Question

when you finish working with chemicals, biological specimens, and other lab substances, always treat your hands with skin lotion. wash your hands thoroughly with soap and water. wipe your hands on a towel. wipe your hands on your clothes.

Explanation:

When working with chemicals, biological specimens, and other lab substances, there is a risk of contamination. Skin lotion does not remove contaminants. Wiping hands on a towel or clothes may spread contaminants or not effectively clean. Washing hands thoroughly with soap and water is the standard practice to remove chemicals, biological agents, and other substances from the hands to prevent exposure (e.g., ingestion if hands touch mouth later, skin irritation from residual chemicals).

Answer:

wash your hands thoroughly with soap and water.