Conflict diamonds are diamonds that are mined to help pay for

Blood Diamonds, also known as "Conflict Diamonds," are stones that are produced in areas controlled by rebel forces that are opposed to internationally recognized governments. The rebels sell these diamonds, and the money is used to purchase arms or to fund their military actions.

Explanation:

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.