Answer:
correct answer is B 3,000 years
Step-by-step explanation:
we are trying to understand behavior & nature of different different matter
and we found that when earliest treatises go back 7th century
to the Indian philosophers and Greek
we find that human is getting curious for about the nature of matter for over a period of about more than 2500 years and it is closely approx 2800 years.
so in the given option 3000 year is closest option
so correct answer is B 3,000 years