A Group of Entities Comprised of a Limited (Parent Entity) $\blacktriangleright$

A group of entities comprised of A Limited (parent entity) , B Limited (subsidiary entity) and C Limited (subsidiary entity) have the following Accounts Receivable balances:
$\blacktriangleright$ A Limited $12 000
$\blacktriangleright$ B Limited $15 000
$\blacktriangleright$ C Limited $10 000
The consolidated financial statements show the following amount as the consolidated Accounts Receivable balance:

A) $12 000;
B) $13 000;
C) $25 000;
D) $37 000.