21. Butter can be a solid or a liquid depending on how hot or cold it gets. What evidence in thearticle supports this idea?
(A) "My dad poured the wet eggs into the pan. The eggs heated up. I observed the changesas the liquid eggs turned into a solid."
(B) "The rest of the stick of butter was getting soft. I put it back in the refrigerator. Next timeI use the butter, that stick will be solid again."
(C) "Then my dad took a stick of butter out of the refrigerator. When my toast was ready, mydad cut off a bit of butter. I put that butter on my toast."depend on 取決於 evidence 證據 support 支持
(D)