Which of the following statements about a p antibonding molecular orbital is true?

Which of the following statements about a p antibonding molecular orbital is true?
 
  A. A p antibonding molecular orbital is formed when two p orbitals of similar phase overlap.
 
  B. A p antibonding molecular orbital is formed when two p orbitals of opposite phase overlap.
 
  C. A p antibonding molecular orbital is a higher-energy molecular orbital than a p bonding molecular orbital.
 
  D. Both the statements a p antibonding molecular orbital is formed when two p orbitals of opposite phase overlap and a p antibonding molecular orbital is a higher-energy molecular orbital than a p bonding molecular orbital are true.