Kerry and Rob just had their first child, Helene. Being financially responsible parents, they want to start saving for Helene's college education so that they will have $355,000 by the time she is 18. Assuming that they have $10,000 in a bank account that pays 5% interest compounded annually today, how much must they add to the account each year to have $355,000 by the time Helene is 18?
A. approx. $16,055
B. approx. $10,221
C. approx. $11,946
D. approx. $11,763
E. approx. $18,254