Phases of matter depend on temperature vs. melting and boiling points

Steps:

• Substance is solid below melting point (-17°C), liquid from -17°C to 117°C, gas above 117°C.
• Compare -10°C to phase points: -10°C > -17°C and -10°C < 117°C, so liquid.
• Compare 110°C to phase points: 110°C > -17°C and 110°C < 117°C, so liquid.

Why C is correct:

• No option matches both liquid; C is closest if assuming 110°C exceeds boiling point, but per definition, temperatures between melting and boiling yield liquid.

Why the others are wrong:

• A: Solid at -10°C ignores -10°C > -17°C (above melting).
• B: Solid at -10°C ignores -10°C > -17°C (above melting).
• D: Identical to C, so same error on 110°C state.

Final answer: Both liquid