In January 2018, Matilda paid $4,500 to acquire 150 shares of MNO stock. In December 2020, MNO declared a two-for-one stock split. If there were no subsequent adjustments, what is Matilda's current basis in the stock, and how many shares does she own?

$2,250 basis; 150 shares.

$2,250 basis; 300 shares.

$4,500 basis; 300 shares.

$9,000 basis; 150 shares.