Which sentence most effectively uses a formal style and tone? because tea cost an arm and a leg in the 1770s, the majority of tea entering britain was illegally smuggled into the country. due to the exorbitant taxes imposed by the government, most of the tea entering britain in the 1770s was illegally trafficked into the country. even though demand for tea was off the charts, government taxes kept the cost so high that only the wealthy could afford to legally buy it. although desire for tea continued to escalate in the 1770s, ridiculously high government taxes forced poor people to buy smuggled tea.

B). Due to the exorbitant taxes imposed by the government, most of the tea entering Britain in the 1770s was illegally trafficked into the country.

Explanation:

Style and tone play a fundamental role in conveying the intended message effectively and create the desired impact on the audience that helps elicit an intended response from them. Style is associated with the word choice, syntax, and language that the authors employ to create a specific effect while tone exemplifies the author's approach towards a specific subject matter which is reflected by the style employed by the author.

As per the question, option B displays the sentence that most appropriately employs a formal style as well as tone as the use of precise words like 'imposed, entering, illegally, trafficked' help create the intended mood and reflect the author's approach towards the 'exorbitant taxes' that gives the readers' with a viewpoint to the perceive the content accordingly. Therefore, option B is the correct answer.