書名：寂天 閱讀滿分2
頁數：p46
題目：Housing prices in the metropolitan area have a tendency to increase in g
eneral, but they rose ______ in the Jasper neighborhood.
A)sharpen
B)most sharply
C)sharp
D)sharpness
疑問：
答案是B)
想請問C)為什麼不行，sharp不是也能當副詞嗎？
謝謝