The dominant theory states language primarily developed for factual information exchange. Conversely, a secondary theory proposes language originated to strengthen social connections, thus aiding human survival.
Option C accurately summarizes these two central perspectives without deviating from the topic.
Option A includes both perspectives but inaccurately suggests a transition from historical beliefs to present academic consensus, which is not the situation.
Option B misses the core of the language origin debate, focusing instead on its progression to more complex forms, thereby misrepresenting the main point.
Option D incorrectly asserts disagreement among experts on these viewpoints, when the author merely presents them without implying any contention.
Therefore, the correct choice is (C): The majority believes language arose from the necessity to convey facts, while others contend it emerged from the need to enhance social unity and collaboration, thereby facilitating human survival.