The thousands place is the fourth over to the left
so we are rounding the number 4
To determine weather it rounds up, we look at the number before it (to the right)
The number 2 is less than 5 so the 4 stays a 4
So we write the number until we get to the thousands position, which would be, 174
we then fill in all the numbers after it with zero's so the number, after it is rounded, is 174,000
So your answer is c