"Lining Up the Decimal Points" Is the Rote Rule That

Multiple Choice

"Lining up the decimal points" is the rote rule that children learn when adding and subtracting decimal fractions. The reasoning behind this rule is:

A) children are following the "one place value at a time" rule when adding and subtracting, similar to what they followed with whole numbers.
B) children will not add together or subtract the wrong numbers.
C) that base-10 blocks won't be necessary for conceptual understanding in this case.
D) that real-life examples won't be necessary for conceptual understanding in this case.