Identifying solid non-metals via Periodic Table positions

Steps:

• Locate elements' positions on the Periodic Table outline to determine their categories (metal, non-metal, metalloid).
• Recall non-metals occupy the upper right side, excluding noble gases and halogens that are gases at room temperature.
• Identify physical states: solid non-metals include carbon (Group 14), phosphorus/sulfur (Group 15/16).
• Select the option matching a solid non-metal position, avoiding metals (left side) and gaseous non-metals.

Why D is correct:

• Element D is positioned in Group 16 (chalcogens), like sulfur, which is a solid non-metal by definition in the p-block.

Why the others are wrong:

• A is a metal in the s-block, solid but metallic conductor.
• B is a transition metal, solid but not a non-metal.
• C is a halogen in Group 17, gaseous at room temperature like chlorine.

Not enough information on exact positions, but assuming standard outline.

Final answer: D