What countries are on the subcontinent? A. china and Mongolia

B. Kazakhstan, Kyrgyzstan, Turkmenistan, Tajikistan, and Afghanistan

C. North and South Korea

D. India, Pakistan, Bangladesh, Nepal, Bhutan, and sir Lanka

C

Explanation:

North abd south Korea are the only Subcontinent countries

d. new methods of assembly are introduced.

explanation:

this allows for the goods to be made on a larger scale. not faster because now it is shown to be made better, hence the greater productivity in the question. it is calling for something new to be introduced.