When a Bacillus Anthracis Population Suddenly Must Form Spores to Survive

When a Bacillus anthracis population suddenly must form spores to survive a harsh nutrient poor environment, how do the cells obtain energy?

A) Cells in a growth phase that have not used up all of their energy will be the only ones to make endospores, which is why relatively few endospores are often made from a large population.
B) Intracellular energy reserves are quickly made available to produce endospores.
C) Slow responding cells are cannibalized by others that already began spore formation.
D) Global regulation is initiated to minimize energy waste in biosynthetic pathways and catabolic pathways are increased to consume remaining usable substrates to fuel spore formation.