16. (20 points) You need to evenly distribute 9 identical cakes among 4 kindergarten children, with the requirement that each cake can be cut into at most two parts. How can you do this? Please write out the specific process.

To distribute 9 identical cakes among 4 kindergarten children, with each cake being cut into at most two parts, follow these steps:

1. Cut 4 cakes in half, resulting in 8 half-cakes.
2. Distribute 2 half-cakes to each of the 4 children. This uses up 8 half-cakes.
3. You now have 5 whole cakes left.
4. Distribute 1 whole cake to each of the 4 children. This uses up 4 whole cakes.
5. You now have 1 whole cake left.
6. Cut the remaining whole cake in half and give each half to any 2 of the 4 children.

Each child will end up with 2 half-cakes and 1 whole cake, which is equivalent to 2 whole cakes. Thus, the cakes are evenly distributed.
【Answer】Solution: According to the problem, each child gets $9 \div 4=2 \frac{1}{4}$ pieces. Divide three of the nine pieces into two parts each: $1=\frac{1}{4}+\frac{3}{4}, 1=\frac{2}{4}+\frac{2}{4}, 1=\frac{1}{4}+\frac{3}{4}$; A: $1+1+\frac{1}{4}$; B: $1+\frac{3}{4}+\frac{2}{4}$; C: $1+\frac{2}{4}+\frac{3}{4}$; D: $1+1+\frac{1}{4}$.