What is the typical weight gain per year during early childhood?

Marina is 9 years old and is capable of concrete operational thought. Similar to most other children her age, she should ______________

a. fail the three mountain task, but pass the abstract thinking task b. still have great difficulty with seriation tasks, such as arranging items from shortest to longest c. be able to organize and manipulate information mentally d. think in terms of hypotheticals

Compared with preschoolers, school-age children are

A) physically less pliable. B) physically more elastic. C) more agile, but less able to balance. D) stronger, but less agile.