How did King Mongkut manage to maintain independence for Siam?

Mongkut, also called Phrachomklao, posthumous name Rama IV, (born Oct. 18, 1804, Bangkok—died Oct. 15, 1868, Bangkok), king of Siam (1851–68) who opened his country to Western influence and initiated reforms and modern development. Mongkut was the 43rd child of King Rama II, but as the first son to be born of a queen he was favoured to succeed to the throne

Explanation:

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.

the answer is c.

i hope this .