Question

in the 1880s, inventor lewis latimer improved upon thomas edisons design for the electric - light bulb. latimer made the light bulb more durable by placing cardboard around its carbon filament. with this innovation, latimer became the first black inventor to contribute to the electrification of the world. 23 which choice completes the text with the most logical transition? a soon, b regardless, c however, d specifically.

Explanation:

The previous sentence states Latimer improved Edison's design and made the light - bulb more durable. The following sentence gives a specific way (placing cardboard around its carbon filament) he did this. "Specifically" is used to introduce a more detailed or particular example or explanation. "Soon" implies time, "Regardless" implies in spite of something, and "However" implies a contrast, none of which fit the context.

Answer:

D. Specifically