White gold is used in jewelry and contains two elements, gold and palladium. A jeweler has two different samples that are both identical in appearance and have a uniform composition throughout. What can be said about the samples?

• A.  They are homogeneous mixtures and be classified as metallic alloys.  
• B.  The materials are heterogeneous mixtures and can be classified by their components
• C.  The samples have variable compositions and are classified as metallic solutions.
• D.  The samples are heterogeneous mixtures that can be separated using magnetic properties.