Answer:
D. Both A and B, above happen simultaneously
Step-by-step explanation:
If the sale of inventory is made on a credit basis, it impacts the following accounts
1. Accounts receivable account would increase by $400
2. Inventory account would decrease by $160
3. The net income would be increased by $240 ( $400 - $160) and automatically, the shareholder equity will also increase by $240
So, the correct option is d.