Write the business rule$($s$)$ that governs the relationship between AGENT and CUSTOMER $($Chapter $2$ Problem $1,$ also figure $2\mathrm{.}1$ & figure $2\mathrm{.}2).$

Group of answer choices

One agent can have many customers.

Each customer has only one agent.

There is a $1$:$1$ relationship between AGENT and CUSTOMER.

There is a $1$:M relationship between AGENT and CUSTOMER.

One customer can have many agents.

Each agent has only one customer.

There is a M:N relationship between AGENT and CUSTOMER.