Answer:
C). Cause and effect strategy.
Step-by-step explanation:
Organization or sequencing of events in a written work play a vital role in conveying the intended message or idea efficiently and effectively to the audience.
As per the question, 'cause and effect' is the organizational pattern that Tatiana has employed in her speech as she arranges her ideas in pattern to reveal the various contributing factors or causes('poverty, drugs and a financially crippled school system) that have led to the effect i.e. increased prevalence of gangs. This pattern of stating cause followed by its effects allows the readers to have a comprehensive understanding of the speech and elicit desired response. Thus, option C is the correct answer.