Tan and Chia are contemplating making a contribution to their grandchildren's education fund but want to be sure that any funds they provide are used for college and not accessed by the grandchildren for other "wants." The couple is retired and they have a significant amount of discretionary income. They also have a very high net worth and are concerned about estate transfer taxes. Which of the education planning techniques would you recommend?

Select one: a. 529 Savings Plan.

b. Starting a savings account for each child at the credit union

c. UGMA or UTMA.

d. Coverdell ESA.