高手帮翻译a)b)d)三点，谢谢！

Attached is the confidentiality agreement , pls send the signed scanned copy on plan paper with following documents for verification. After our confirmation send the hard copy to us. a) List of Directors on company letter head : Scanned signatures will not do. It should be physically signed by the person against name. b) Board Resolution: It should also be printed on letterhead and physically signed . c)??Business Registration Certificate : for Address proof d) Authorization letter on letter head for the signing authority