Question

what was most responsible for the development of professionalized journalists and the norm of \objectivity\ in newspapers?
the best way to appeal to a large audience is to produce a standardized, neutral news product.
the decline of political party machines made party - driven news economically infeasible.
voters grew distrustful of politicians and sought new sources of information.
citizen literacy was on the rise, and people wanted to read the news.

Explanation:

The development of professionalized journalists and the norm of "objectivity" in newspapers was influenced by multiple factors. The need to appeal to a large audience led to the production of a standardized, neutral news product. This was because a neutral stance could attract more readers compared to partisan or biased reporting.

Answer:

The best way to appeal to a large audience is to produce a standardized, neutral news product.