(16.6) D creates a trust with income to A for As life with a remainder to B or Bs estate. Discuss to what extent, if any, D has made a completed gift if A, B, and C are unrelated to D and:

D retains a power to give income to C, but only with As approval.

D retains no power over trust income, but does retain a power to make C or Cs estate the remainder-person if D secures As approval.

D retains a power to give either the income or the remainder, or both to C, but only with As approval.

D retains a power to revoke the entire trust, but only with As approval.