Choose the answer with the correct missing numbers and the correct expression to describe the conversion.

Kilograms Grams
4 4,000
5 5,000
6 6,000
7 _____
8 _____
9 _____
K K x _____
7,000; 8,000; 9,000; K + 1000
700; 800; 900; K x 100
7,000; 8,000; 9,000; K x 100
7,000; 8,000; 9,000; K x 1000