Answer:
B) 8, 800, 000
Step-by-step explanation:
The number of cars in year 1= 80,000,000
She found that the number of cars on the roads increases by 10% each year.
Now let's find 10% of 80,000,000
= 
So the number of cars in year 2= 80,000,000 + 8,000,000
= 88,000,000
Now let's find 10% of 88,000,000.
= 
So the number of cars in year 3= 88,000,000 million+8,800,000= 96,800,000
Now we have to find difference in year 3 compared to in year 2.
The difference in the cars in year 3 compared to year 2= 96,800,000 - 88,000,000
= 8,800,000
Therefore, the answer is B) 8, 800, 000