Beena is considering buying a lamp from an online store for $30. When her friend finds out, he offers to sell her the same lamp he bought recently (unused) for $20. If Been buys the lamp from her friend, which of the following is true? O a. Beena will experience an increase in consumer surplus O b. Beena will experience an increase in producer surplus O c. Beena will experience a decrease in consumer surplus O d. Beena will experience a decrease in producer surplus