Convert the given sentence into active/passive voice. **Change the following from active to passive: Researchers are conducting several tests to verify the theory.**

Options:

• A: Researchers had conducted several tests to verify the theory.
• B: Several tests have been conducted to verify the theory.
• C: Several tests were conducted by researchers to verify the theory.
• D: Several tests are being conducted by researchers to verify the theory.

Related Practice Questions:

• Which of the following artifacts, extensively found at Burzahom and Gufkral, specifically indicates that the Neolithic inhabitants of Kashmir practiced sewing animal skins for clothing to survive the harsh winters?
• The earliest known evidence of rock art in India, in the form of 'Cupules' (hemispherical cup-shaped depressions carved into rock), belongs to the Lower Paleolithic age and was found at:
• The first human colonization of the fertile Ganga plains, as evidenced by archaeological discoveries at Sarai Nahar Rai and Mahadaha, took place during which period?
• Which prehistoric site located in the Thar Desert of Rajasthan provides a continuous and undisturbed profile of Lower, Middle, and Upper Paleolithic cultures?