Natalie Transferred $500,000 of Bonds to a Revocable Trust with Directions

Natalie transferred $500,000 of bonds to a revocable trust with directions to the trustee to pay income to her aunt for five years after which the corpus is to be distributed to Natalie's niece. At year end, the trustee paid $15,000 of income to the aunt. Which of the following is a true statement?

A) Natalie has made a completed gift of $500,000.
B) Natalie has made a taxable gift of $1,000.
C) Natalie has not made a completed gift because the trust is revocable.
D) Natalie has made a taxable gift of $474,000.
E) None of these