Science must be used to figure out the correct weight, length, and what material it is made out of to be the most successful at its job. Technology must be used to make sure that the calculations are correct and to use a 3d printer or something like that to make it, that or robots/tools.
The correct answer is letter B. The food molecules that cannot be digested need to be eliminated from the body. This can be done by taking in certain kinds of medicines that stimulate the digestive tract to pass out the food molecules that are indigestible.
