Stacey inherits unimproved land (fair market value of $6 million) from her father on June 1, 2017. Stacey makes the following disclaimers, disclaiming her interest in the property as follows: a disclaimer made on December 1, 2017 disclaiming one-third interest; a disclaimer made on January 3, 2018 disclaiming another one-third interest; and a disclaimer made on May 31, 2018 disclaiming the remaining one-third interest. In all cases, the disclaimers pass the interest to her son (the next heir under state law). The Federal gift tax applies to:

a.

All of the land.

b.

One-third interest.

c.

Two-thirds interest.

d.

None of the land.