Which of the following hypotheses follow logically from the theory that children age 5 add numbers by counting upward from the first addend?Group of answer choices
A The amount of time it takes children to solve an addition problem is independent of the first addend.
B The amount of time it takes children to solve an addition problem is independent of the second addend.
C The amount of time it takes children to solve an addition problem increases linearly with the size of the second addend.
D The amount of time it takes children to solve an addition problem increases linearly with the size of the first addend.