Elizabeth Taylor, the Hollywood legend died at Cedars-Sinai Hospital _______ by her four children after being taken to hospital six weeks ago with heart failure.

A．to be surrounded

B．having been surrounded

C．surrounded

D．surrounding

26号元素原子的价层电子构型为（）。

A.3d⁵4s²

B.3d⁶4s²

C.3d⁶

D.4s²