In the sentence below, how are the underlined nouns best classified?
"Curiosity and imagination help children become independent learners."
Ⓐ Proper, concrete, countable nouns.
Ⓑ Proper, abstract, uncountable nouns.
Ⓒ Common, concrete, countable nouns.
Ⓓ Collective, abstract, countable nouns.
Ⓔ Common, abstract, uncountable nouns.