Question

throughout the early 2000s, the city of medellín, colombia, invested heavily in urban design, adding cable cars, libraries, and outdoor escalators in underserved neighborhoods. it also constructed the parque biblioteca españa complex in 2007, anchoring educational and cultural services in one of the city’s most isolated districts. ____ these initiatives helped reduce travel times by more than 40 percent and contributed to a measurable decline in homicide rates over the decade.
22 ◇ mark for review ∙
which choice completes the text with the most logical transition?
(answer : c)
① previously,
② finally,
③ in sum,
④ however,

Explanation:

The text first describes the city's investments in urban design and a specific complex. The last sentence presents the results of these initiatives. "In sum" is used to summarize or conclude the effects of the previous actions, which fits logically. "Previously" refers to a prior time, "Finally" implies a last action in a sequence, and "However" introduces a contrast, none of which fit as well as "In sum" here.

Answer:

C. In sum,