I came across writing in history, and I hesitate on this situation. Is it "Christopher Columbus' expedition" or "Christopher Columbus's expedition"? Or is it something else?

English testmatch ! match the definition to the term. 1 . adjective phrase a verb form (which may end in -ing ) used as an adjective 2 . phrase a verb form used as another part of speech 3 . restrictive clause a verb form ending in -ing used as a noun 4 . verb phrase group of words without a subject and verb used as single part of speech 5 . gerund phrase verb form preceded by to that is used as a noun, an adjective, or an adverb 6 . participle phrase beginning with a preposition 7 . verbal prepositional phrase modifying a noun or pronoun 8 . adverb phrase participle with complements and modifiers 9 . coordinating conjunction verb ending in -ing used with a verb 10 . gerund prepositional phrase modifying a verb, adjective, or adverb 11 . prepositional phrase a conjunction that joins words or groups of words of equal rank 12 . infinitive an adjective clause that is essential to the meaning of the sentence 13 . participial phrase a verbal form ending in -ing with its object and modifiers used as a noun

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Me i need a correct answer how did mlk jr.’s “voice” in his speeches shape the civil rights movement?