Answer:
B. the assembely line was more time and cost efficent
Explanation:
River Valleys, as these had the best soil for agriculture and were close to a major fresh water supply.
Whenever, we multiply a number with a fraction which is less than 1, the answer must be smaller than the number itself.
It is because, number which is smaller than 1 can be like: 1/2 or 1/3 etc, here you can see lower number (denominator) is greater, it will divide our original number, so if it will be greater, our number will be smaller.
Example. - 5 * 1/2 = 2.5
Here, 2.5 is smaller than 5. & it is 2 times, 'cause 2 was our denominator !!!
Hope this helps!
