Jon Owns 12,000 Shares of Do It Write, Inc

Jon owns 12,000 shares of Do it Write, Inc. The shares are currently priced at $27 a share. Jon just received a rights offering with a price of $23 plus 4 rights. Jon would like to purchase 4,000 shares
Of this new offering. To do this, Jon should:

A) Exercise his entire offer that will give him the total shares he desires.
B) Request an oversubscription of 4,000 shares at the offer price.
C) Exercise his entire option and wait for another offer to buy the balance of the shares he desires.
D) Exercise his entire option and oversubscribe for 1,000 shares.
E) Exercise his entire option and agree to a standby underwriting.