Regarding Early Childhood Learning of Math Concepts, Which of the Following

Regarding early childhood learning of math concepts, which of the following statements is TRUE?

A) Children should not be taught about money, because this increases their focus on materialism and consumerism.
B) In order to avoid confusion when learning measurement, early childhood professionals should be sure to use only standard measurement tools.
C) Children are capable of learning about a variety of measurement instruments including thermometers, speedometers, odometers, and clocks.
D) Young children are capable of learning about measurement, time, and money but have difficulty grasping concepts like space, physical property, and motion.