Which of the Following Statements Is True

Which of the following statements is true?

A) .A gift in a trust 'to Lucinda if she obtains an honours degree' is vested because, since the beneficiary is identified by name, she is immediately ascertainable.
B) A trust created by Alison in her will 'to such of my children who may be living at the date of my death' confers only contingent interests because the children are not named.
C) A gift in a trust to Martin when he reaches the age of 18 years is contingent until Martin reaches that age.
D) A gift in a trust 'to Lavinia's first-born child' gives that child a vested interest as soon as that child is born.