Answer:
The billing function should be assigned to persons other than those responsible for maintaining accounts receivable subsidiary records.
Explanation:
The first choice it's considered an effective Internal control procedure for accounts receivable.
This is because it is not safe that the person who prepares the billing is the same who record cash receipts or any other document over the account receivables.
This is what we call Segregation of Duties and this is an internal control determined to avoid fraud or error.
Probably swimming unless for photography you use a cheap camera :p
It really just depends how you look at it
According to Diffusion of Innovation, or order for an innovation to ultimately be adopted it has to be compatible with social norms.
The theory that obtains to explain how, why and at what rate new ideas and technology spread through cultures.