Question

what is the meaning of the word guileless in the sentence? \is this a diamond?\ asked the little girl with a guileless smile as she held up a piece of quartz. sarcastic sincere mischievous silly

Explanation:

The word "guileless" means without deceit or cunning. In the context of the little - girl asking if quartz is a diamond with a "guileless" smile, it implies a sincere and innocent expression.

Answer:

B. sincere