收集所有质量可靠的随机对照试验经过荟萃分析属于

A．一级证据
B．二级证据
C．三级证据
D．四级证据
E．五级证据

Katch Co is a small private limited company. Although there are three members of its board of directors, the actual day-to-day running of the business is left to one of them, Len, who simply reports back to the board on the business he has transacted. Len refers to himself as the managing director of Katch Co, although he has never been officially appointed as such.Six months ago Len entered into a contract on Katch Co’s behalf with Mo to produce some advertising material for the company. However Katch Co did not wish to proceed with the advertising campaign and the board of directors have refused to pay Mo, claiming that Len did not have the necessary authority to enter into the contract with him.Required:Analyse the situation with regard to the authority of Len to make contracts on behalf of Katch Co and in particular advise whether or not Katch Co is liable to Mo. (10 marks)