答案：B

解析：

The key to the sentence is the word "Although," which suggests a contrast of some sort between what Suzette's parents believed and what her teachers thought. Choice (B) is the only pair of contrasting terms. In this context, "brilliant" means defined by striking and unusual mental keenness, and "unremarkable" means ordinary and unimpressive. The sentence indicates that the teachers did not share the parents' opinion: Suzette's parents believed everything their daughter produced was striking and unusually smart, but her teachers thought her work was ordinary and not deserving of special notice.