On a properly addressed business envelop, the attention line should be?

Question

a)after the company , department, title, or other important subinformation

b)on the back of the envelope

c)in the frist line of the address, befor the recipient's name.

d)in the lower left corner of the envelope

Answer 1

i would say "a"

Answer 2

C)  In the first line of the address, before the recipient's name.