Explanation
Correct answer: C.
Choice C is the best answer. "Later" logically signals that the information in the sentence—that in 2017 Gomez created a platform for others to share stories about their immigration experiences—occurs later in a chronological series of events than the previous information about Gomez winning his first storytelling competition in 2014.
Why the other choices are wrong
Choice A
Choice A is incorrect because "instead" illogically signals that Gomez created a platform for others to share stories about their immigration experiences as an alternative to winning his first storytelling competition. Rather, Gomez created the platform later—in a chronological series of events—than when he won the competition.
Choice B
Choice B is incorrect because "for example" illogically signals that the information about Gomez creating a platform for others to share stories exemplifies his winning his first storytelling competition. Rather, Gomez created the platform later—in a chronological series of events—than when he won the competition.
Choice D
Choice D is incorrect because "in other words" illogically signals that the information about Gomez creating a platform for others to share stories is merely a paraphrase or restatement of the previous information about Gomez winning his first storytelling competition. Rather, Gomez created the platform later—in a chronological series of events—than when he won the competition.