Oracle: what permission is necessary to "grant create table" to another user? What permission should A have in order to grant B permission to create a table?

logged in as user A, I execute

grant create table to B;


and receive the following error:

SQL Error: ORA-01031: insufficient privileges
01031. 00000 -  "insufficient privileges"
*Cause:    An attempt was made to change the current username or password
           without the appropriate privilege. This error also occurs if
           attempting to install a database without the necessary operating
           system privileges.
           When Trusted Oracle is configure in DBMS MAC, this error may occur
           if the user was granted the necessary privilege at a higher label
           than the current login.
*Action:   Ask the database administrator to perform the operation or grant
           the required privileges.
           For Trusted Oracle users getting this error although granted the
           the appropriate privilege at a higher label, ask the database
           administrator to regrant the privilege at the appropriate label.
It looks like you are attempting to grant permissions one schema to another schema.  Such a thing does not exist in Oracle, but there are workarounds.

The easiest way to make this happen is to grant the CREATE ANY TABLE privilege to B, but there are obvious security concerns with doing so.