and ___ are the two most widespread religions in Africa. (1 point)
Christianity / Islam
Hinduism / Islam
Christianity/Traditional African religions
Islam / Traditional African religions

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.

just took the test the answer is b.