Presuming that it takes a few billion years for complex life to evolve in a stable environment,what kind of stars are most likely to currently have inhabited planets?

Question

Quizplus · Accepted Answer

G to K main sequence stars, such as our Sun, are the most abundant in the galaxy and have stable environments for billions of years, giving enough time for complex life to evolve. B to A main sequence stars are brighter and hotter, but also have shorter lifespans and more variability in their environments. G to K giants are nearing the end of their lifespans and may have unstable environments, while white dwarf stars do not have a habitable zone for planets to orbit.

Presuming That It Takes a Few Billion Years for Complex