When 10-Year-Old Meg Tackles a Word Problem That Requires Her

Multiple Choice

When 10-year-old Meg tackles a word problem that requires her to add the numbers 29 and 56, she arrives at the solution "715." Based on her error, you might reasonably guess that Meg:

A) Has not yet acquired proportional reasoning ability
B) Does not engage in metacognitive oversight of her problem solving
C) Has not yet learned basic addition and subtraction facts
D) Is thinking abstractly about a situation that does not call for abstract thought