Answer
C) They're liquid solutions.
Step-by-step explanation
An alloy is a mixture of metal with a second metal or other non-metal material. Airplanes, bicycles, and cooking pots are all usually made of different types of alloys. Examples of alloys include stainless steel, brass, bronze, brass, solder metal, pewter, and sterling silver.
Alloys can contain more than one metal so option A is not true.
Elements of an alloy do not combine through a chemical reaction. The mixing is generally done at a very high temperature where the elements and metals are melted, mixed, and left to cool; hence option B is not true.
Also, option D is not true because alloys are a mixture of metal with a second metal or other non-metal.
Hence, the best option is that all alloys are liquid solutions of metals and or other non-metals.
The correct answer is option C) They're liquid solutions.