Which learning disability is characterized by difficulty in making arithmetical calculations?

While eating lunch in her highchair, Darci, a six-month-old baby, accidentally drops her spoon. After dropping her spoon, Darci is likely to ___

a. appear unaffected b. look in her hand for the spoon c. look on the floor for the spoon, but give up looking if the spoon is not partially visible d. scan and search the floor persistently for the spoon until she finds it

When parents make frequent comparisons between same-sex siblings who are close in age,

A) children strive harder to develop independent personality traits. B) siblings make gains in perspective-taking skills. C) sibling rivalry tends to increase, particularly during toddlerhood and the preschool years. D) it results in more quarreling and antagonism for the children.