Which statement is true when recording the sale of goods for cash in a perpetual inventory system?

a- Two journal entries are necessary: one to record the receipt of cash and reduction of inventory, and one to record the the cost of goods sold and sales revenue.

b- Only one journal entry is necessary. It will record cost of goods sold and reduce of inventory.

c- Only one journal entry is necessary. It will record the receipt of cash and sales revenue.

d- Two journal entries are necessary: one to record the receipt of cash and sales revenue, and one to record the cost of goods sold and to reduce inventory.