Which of the following statements are true of multibusiness diversification strategies? $($Choose every correct answer.$)$

Multiple select question.

Some multibusiness enterprises are diversified into unrelated areas but have a group of related businesses within each area.

Combination related$-$unrelated diversification strategies are attractive to companies with a mix of valuable competitive assets.

Some companies are narrowly diversified around two to five related or unrelated businesses.

In dominant$-$business enterprises, no single business generates more than $25\%$ of the overall revenues.