Conventions of Usage: Identifying Formal Tone in Writing

During the early years of the internet, many experts were uncertain about the long-term implications of this new technology. While some believed that it would transform communication in ways previously unimaginable, others remained skeptical, arguing that it was simply a passing trend. Today, however, it is evident that the internet has become an integral part of daily life.

For the sentence that follows, choose the option that best maintains the formal tone and clarity of the paragraph. The sentence reads as follows: "Though it has introduced numerous benefits, there are significant challenges, especially in terms of privacy and security concerns."