Challenge #1 of 1

Q: 

I have a Product entity that is a ManyToMany to Distributor. Imagine that the $distributor, $product1 and $product2 objects have already been saved to the database:

$distributor->addProduct($product1);
$entityManager->flush();

$distributor->addProduct($product1);
$distributor->addProduct($product2);
$entityManager->flush();

$distributor->removeProduct($product1);
$entityManager->flush();

After running this code, how many rows are in the product_distributor table?