17. 如右圖所示,假設雙極性接面電晶體VBE = 0.7,β = 100,RB=200 =Ω,RC= 4 =Ω,則集極電壓VC約為下列何者?(A) 1.4 V(B) 3.5 V(C) 12 V(D) 15 V