Quickbooks online QBO question

To manually apply an open credit memo to a customer invoice, ______________________.

a. Click Sales on the navigation bar, click All Sales, and select Payment on the New transaction dropdown menu.

b. Click Sales on the navigation bar, click All Sales, and select Apply on the New transaction dropdown menu.

c. Click Sales on the navigation bar, click Invoices, and click Apply Credit.

d. Credit memos can't be manually applied in QBO