Which situation is best represented by the following equation?

1750 − 250x = 1000
a) the russell family went on a vacation. they started with $1750 and spent $250 each day. what is x, the number of people in the russell family?
b) the russell family went on a vacation. they started with $1750 and spent $250 each day. what is x, the amount of money the russell's have left to spend?
c) the russell family went on a vacation. they spent $250 each day. what is x, the number of days the russell's have been on vacation if they have $1750 dollars to spend?
d) the russell family went on a vacation. they started with $1750 and spent $250 each day. what is x, the number of days the russell's have been on vacation if