The answer is B. "Esta" is more of a location and feeling word and "es" is a description word. The phrases are talking about how she is smart and pretty so they are both describing her therefor he answer is B.
Just look up the book in spanish. type "Libro de piratas del caribe y el mapa secreto" on google and i'm sure the whole book will come up just gotta browse all the way to the 4th chapter.
