Distant relatives often share no common DNA or sometimes more that they should. That is$,$ the shared DNA can be extremely variable. Why?

Question $11$ options:

Because recombination is random.

Because of Mendel's $1$st Law, the chance of getting one of two chromosomes is $50$:$50.$

Because of Mendel's $2$nd Law, the chance of getting two of the same chromosomes simultaneously is very small.

Because at low numbers of DNA segments, the chance of getting zero segments increases.

Because when you have one or two segments at the same locus $($Mendel$\text{'}$s $2$nd Law$),$ the size of the segments $($caused by recombination$)$ is more a factor than the number of segments.