Isn’t this question wrong?
The mitosis allows the fertilized egg cells to grow more cells during the development of an embryo, growing the organism doesn’t occure during this process.
I think A and C are the correct answers. Right?
You’re right that the first mitotic divisions of the zygote doesn’t make the zygote grow in size, BUT it still grows in number of cells.
I think this question was looking for a more general answer, if they had phrased it as “allows ALL organisms to grow in size” or “ALWAYS allow organisms to grow in size” you would have been correct
I also tend to think there’s always a trap somewhere in the questions!
Hope this helps!