The answer is:
B. They Are Abstract, With Shapes That Suggest Real Objects
C. His Stabiles Can Be View From All Sides.
D.They Have Simplified Flat Shapes That Intersect At Opposing Angles
Alexander Calder was an American sculptor with a degree in engineering who created the mobile, a new type of sculpture that involves movement, he used his knowledge in engineering to apply the kinetic in his works and use an abstract style is most of his art.