Which of the mass movements listed below is the fastest? select one: o a. mudflows o b. soil creep o c. avalanche o d. earthflow

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.

the answer is the last option or letter d)