Adam,Barb,and Carli Each Like to Read Novels

Adam,Barb,and Carli each like to read novels.The current bestseller costs $10.Adam values it at $15,Barb at $13,and Carli at $11.Suppose that if the government taxes books at $2 each,the selling price will rise to $12.A consequence of the tax is that

A) consumer surplus shrinks by $4 and tax revenues increase by $6,so there is a deadweight loss of $2.
B) consumer surplus shrinks by $6 and tax revenues increase by $6,so there is no deadweight loss.
C) consumer surplus shrinks by $5 and tax revenues increase by $6,so there is no deadweight loss.
D) consumer surplus shrinks by $5 and tax revenues increase by $4,so there is a deadweight loss of $1.