Which of the following transfers results in an adjusted taxable gift?

Harriett and George give their son and his wife the sum of $55,000 in stock in 2018.

Bob transferred his $500,000 life insurance policy to an irrevocable trust of which his adult daughter is beneficiary. The life insurance policy had a gift tax value of $12,000 at the time of the transfer.

Cathy gave each of her four children the sum of $10,000 for Christmas. These are the only gifts Cathy made to her children during the year.

Geoffrey has 16 grandchildren and gave each of them $14,000 for their birthdays. At Christmas, he gave each of them an additional $10,000.