When a company advertises on the Internet, the company pays the operators of search engines each time an ad for the company appears with search results and someone clicks on the link. Click fraud is when a computer program pretending to be a customer clicks on the link. An analysis of $1,100$ clicks coming into a company's site during a week identified $145$ of these clicks as fraudulent. Complete parts $($a$)$ through $($c$)$ below.

$($a$)$ Under what conditions does it make sense to treat these $1,100$ clicks as a sample? What would be the population? Identify the necessary conditions. Select all that apply.

A$.$ The clicks must be selected at random.

B$.$ The company must be representative of all companies that advertise on the Internet.

C$.$ The week must be representative of a typical week.

D$.$ The week must be randomly selected.

Identify the population below.

A$.$ All fraudulent clicks

B$.$ All clicks on ads placed in search results

C$.$ All companies that advertise on the Internet

D$.$ All clicks into this company's site