What technology led editors to substitute news reports for partisan commentary?Multiple Choicepower-driven printing pressesbroadcast TVtelegraphcable TVradio

1. Break Down the Problem

To answer this question, we need to identify which technology allowed editors to shift from neutral news reporting to more opinion-based or partisan commentary.

2. Relevant Concepts

Let's briefly look at the impact of each technology mentioned in the options:

1. Power-driven printing presses - Revolutionized the printing process and increased the circulation of newspapers.
2. Broadcast TV - Introduced visual news coverage but was more focused on news reporting.
3. Telegraph - Allowed for faster news dissemination, but did not inherently change the nature of commentary.
4. Cable TV - Marked a significant shift in news reporting as it provided multiple channels and options for viewers, leading to specialization in news formats, including opinion-based programming.
5. Radio - Emerged as an immediate news source but maintained a more neutral reporting style compared to later developments.

3. Analysis and Detail

Among these options, cable TV stands out as the technology that not only provided news but also encouraged thematic channels focused on commentary and opinion, leading to a more partisan approach.

4. Verify and Summarize

While power-driven printing presses facilitated the growth of newspapers, it was cable TV that allowed for the proliferation of networks specifically dedicated to commentary, thus supporting the trend towards partisan reporting.

Final Answer

Cable TV is the technology that led editors to substitute news reports for partisan commentary, as it allowed for diverse channels catering to specific views and opinions.