单选题 下述各图给出的四个并发调度中，哪个不是冲突可串行的?
A)

T1	T2
Read(A) Write(B)	Read(A) Write(A)

B)

T1	T3
Read(A) Write(B)	Read(B) Write(A)

C)

T4	T5
Read(A) Write(B)	Read(A) Write(B)

D)

T1	T4
Read(A) Write(B)	Read(A) Write(B)