Which of the following best describes the solution to the system of equations below?

3x + 6y = 9
6x + 12y = 18
A.
The system of equations has exactly one solution where and .

B.
The system of equations has infinitely many solutions.

C.
The system of equations has exactly one solution where and .

D.
The system of equations has no solution.

Item 1 which question could the expression 1000n answer? let n = the number of gallons of gas used. how many miles per gallon did the car get driving 1000 miles? let n = the number of grams of food needed for each dog. how many grams of food are needed to feed 1000 dogs? let n = the number of people at the show. how many empty seats were there at the show if there are 1000 seats at the theater? let n = the number of seats at the theater. how many empty seats will there by if 1000 people come to the show?