Which of the Following Statements Is True

Which of the following statements is true?

A) Bond dissociation energies decrease down a column of the periodic table.
B) Bond dissociation energies increase down a column of the periodic table.
C) When DH° is positive, more energy is released in forming bonds than is needed to break bonds.
D) When DH° is negative, more energy is needed to break bonds than is released in forming bonds.