Moira placed $2 in an empty piggy bank, and then added $3 every month. The same day, Nathan placed $5 in an empty piggy bank, and then added $3 every month. The graph below represents their savings.

Based on this graph, which statement is true?

The amounts in the piggy banks will never be the same.

At the end of 5 months the amounts in the piggy banks will be equal.

After the amount in each piggy bank reaches $30, the amounts will continue to be equal.

The amounts in the piggy banks will always be equal because each piggy bank receives $3 each month.