Question: Which procedure correctly describes materials combining?

  Options: 
 A. Salt and sand are added to hot water and stirred making a mixture.
 B. Oil and water are placed in a sealed bottle and shaken making a compound.
 C. Sugar and water are added to flour and cooked in an oven making an element.
 D. Soil and water are shaken in a container and left to separate forming two elements.
Answer: A