I don't know what your study unit says.
However, according to these sources, your answer is wrong.
https://www.google.com/#q=toddler+age
In this study unit, a child is considered a toddler between the ages of
A. one and two years.B. one-and-a-half and three years.C. one and one-and-a-half years.D. one-and-a-half and two years.
My Answer is B
3 answers
Ok my answer is A
That seems to be the best answer.