26 for how long has mankind tried to understand the behavior of matter? ao 2,500 years bo 3,000 years co 2,000 years do 1,500 years

correct answer is B  3,000 years

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