37 如圖為一雙極性電晶體電路。雙極性電晶體的 β=100，VBEactive = 0.7 V，Cπ = 20 pF，Cμ = 5 pF，忽略爾利效應。VT = 25 mV，求高頻 3 dB 頻率（選最接近之值）？
(A)7.86 kHz
(B)39.3 kHz
(C)187 kHz
(D)796 kHz