One of the following properties is not the property of a good gene cloning vector used in recombinant DNA technology:

• A

  The vector must be small in size so that it is easy to isolate and purify.

• B

  It should have a selectable marker that helps in selecting the transformed host cells.

• C

  It should have an origin of replication, a base pair sequence where replication starts.

• D

  The vector should not have any unique recognition site to insert  the foreign DNA.