Question

when a star reaches the black hole stage of its life

it is a very old star
it will give off new energy
it will grow in size
it is still a young star

Answer 1

A. It is a very old star

'cause when they reach their, it means they were very massive before, and for burning that amount of fuel, they took a very long time. So, we can say they are very old star.

Hope this helps!

Answer 2

A. it is a very old star