Ask us of the following summaries accurately describes the stalemate that developed during World War 1?

The stalemate in World War I was characterized by trench warfare, where both the Allied and Central Powers faced significant difficulties in making territorial gains. This deadlock arose due to advances in military technology, which made offensive maneuvers costly and dangerous, leading to high casualties without substantial progress. As a result, the war became a prolonged conflict, with both sides entrenched and unable to break the impasse for several years. The lack of decisive victories contributed to the war's eventual expansion and the involvement of additional nations.