A. Flash mobs seem both interesting and safe, unless participants are irresponsible.
Answer:
The Internet has changed business, education, government, healthcare, and even the ways in which we interact with our loved ones—it has become one of the key drivers of social evolution. The changes in social communication are of particular significance
Your answer is "why"
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<em>‘wherefore’ is a bit more difficult because it could be confusing. In Renaissance English ‘wherefore’ meant ‘why.’ So Juliet is saying “Why are you Romeo?”</em>