At approximately what age do boys and girls understand the concept of gender constancy?

Candace is a flight attendant for a large, international airline. while in china, candace often finds look-alikes in famous designer brands of watches, handbags, clothing, and golf clubs. in fact, she'll do her christmas shopping there and will even buy good-quality items for auctioning at her son's preschool events back in the u.s. candace's actions demonstrate

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

Like many cities in the south, atlanta was poorly prepared to meet the emergency of the great depression.  which statement  bestdescribes how atlanta was poorly prepared?