What type of relationship is expressed with the following business rules: "Each student takes one or more classes" and "Each class may be taken by one or more students"

Group of answer choices

$1$:$5($one to five$)$

M:N $($many to many$)$

$1$:M $($one to many$)$

$0$:$1($zero to one$)$

$1$:$1($one to one$)$