In order to decrease the danger of human error while driving, some car developers are working on?

The answer is: 'self-driving' cars

self-driving cars are developed with A.I technology in order to sense the environment around them without needing any control or input from human being. In 2018, it is predicted that car developers approximately have invested around 80 Billion dollar in the development of self-driving cars.

answer: b ?

explanation:

lab rats that ate more artifical sweeter gained more weight than those who ate sugar and they had “lower levels of a hormone called glp-1, which affects how full we feel.”