下列哪种物质不会导致新生儿肺动脉高压（）

A.血栓素A₂

B.血小板活化因子

C.白三烯

D.一氧化氮

E.内皮素

In order to ensure database's ( ), DBMS provides grant, function to control user's access rights.

A．security

B．integrality

C．consistency

D．dependability