Select the most appropriate word to Fill in the blank.
Around 1,900-4,200 years before the present time was a time of _______ change in India, characterized by the urbanization of the Indus Valley civilization.

Options

A. promising
B. weighty
C. profound
D. reflective

Explanation

(c) profound-(of a state, quality, or emotion) very great or intense.
(a) promising- आशाजनक -showing signs of future success.
(b) weighty- भारी- weighing a great deal, heavy.
(d) reflective-providing a reflection, capable of reflecting light or other radiation.