Which of the Following Statements Is True

Which of the following statements is true?

A) Grassland vegetation has remained relatively important in Australia throughout all geological periods.
B) 'Fire sensitive' open forests increased in importance over time as burning levels increased.
C) 'Fire tolerant' vegetation increased in importance in Australia as geological periods progressed towards modern times.
D) Rainforest and grasslands have been of similar importance in Australia.
E) Rainforest was replaced with fire-tolerant vegetation in early Tertiary.