In order to improve our English, an English evening is going to held in our school dining hall. It will start from 7:30 p.m. and end at 10:00 p.m. the next Friday. You will enjoy English stories at the “evening”. Some English songs will also be singing. What’s more, some English poems and short plays will he performed, either. In addition, Mr. and Mrs. Brown from Canada, working in our school, together with his children, will be invited to our “evening”. They will give us wonderfully performances. Everybody is welcome to attending the “evening”. We hope all of you can be there on time and will appreciate the performances. We also hope your English will be greatly improve after this “evening”.

“霍桑实验”发现决定工作效率最重要的因素是（）

A.人际关系

B.严格的纪律

C.统一的指挥

D.科学的领导

E.自我控制