In an experiment, pet owners are being encouraged to take their pets to work, a move _______ can be good for both the people and the pets.

A．that some scientists say

B．in which some scientists say

C．some scientists say that

D．some scientists say

下列试剂可加入保存标本冻存液中的是（）。

A.EDTA和二甲亚砜

B.Versen溶液和甘油

C.二甲亚砜和甘油

D.SDS和甘油

E.胰酶和二甲亚砜