Phases of matter depend on temperature relative to melting and boiling points

Steps:

• Melting point at -17°C means solid below -17°C, liquid above -17°C up to boiling point.
• Boiling point at 117°C means liquid below 117°C, gas above 117°C.
• At -10°C, -17°C < -10°C < 117°C, so the substance is liquid.
• At 110°C, -17°C < 110°C < 117°C, so the substance is liquid.

Why C is correct:

• Not applicable; both temperatures fall in the liquid range per phase transition definitions.

Why the others are wrong:

• A assumes solid at -10°C (false, above melting) and gas at 110°C (false, below boiling).
• B assumes solid at -10°C (false, above melting) and liquid at 110°C (true but pair incorrect).
• D identical to C, so same error as C.

Not enough information to select from flawed options; states are liquid and liquid.

Final answer: both liquid