Paragraph 5 supports which of the following about the death of the Sun? A. The Sun's outer envelope will expand rapidly as a result of decreasing temperatures in the outer zone. B. The Sun will reach the red giant stage millions of years before it becomes a white dwarf star. C. After the Sun has released the material of its outer envelope into space, nuclear fusion will continue at the remaining core for a limited period. D. While the outer region of the Sun expands, it releases all its material into space.