Propose a simple two-arm field experiment to test slug preference for decaying wood vs damp leaves.

• A. In a controlled arena with two equally moist options (wood vs leaves), measure preference by time spent or consumption over a fixed period
• B. Survey a forest for slug counts across substrates
• C. Place both substrates in the same area and measure only slug color
• D. Remove all slugs and observe movement in a bare arena

Answer: (A)