CTET Class I to V 1 Jan 2021 Paper

There is a paragraph in class V EVS textbook based on Al-Biruni's observation of construction of ponds in India some thousand years ago. What would be the purpose of including this paragraph?
A. It helps learners to identify sources of history.
B. It helps learners to improve their recording of observations.
C. It helps learners to appreciate technology present in India some 1000 years back.
D. It helps learners to appreciate the role of evidence in history.