Which planet will take the longets amount of time to orbit the sun

Neptune tales the longest.

Explanation:

given its distances from the sun, Neptune has the longest orbital period of any planet in the solar system.

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.