ask about manner

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Simple question,but i just wanna which one is the best attitude if u come to one company,for applying a job,or proposing something,or in my case,i want to propose survey permitt for my thesis, when u meet the person(director,or somebody else who in charge) u must shaking hand with him or her, what we gonna do at that time?? a.greeting "good day" b.saying ur name"Hi I'm Sum Wan" c.just smile d.others,..... hehehe,so for u guys that professional working out there,please share ur exprience..which one is the best thing to do