Which of the following choices would likely require the highest bid amount?

Exact match keywords typically require the highest bid amount because they are the most restrictive match type. This means your ad will only show for searches that exactly match your keyword or a close variant, leading to higher relevance and conversion rates. Advertisers are willing to pay more for this precision. Brand keywords, while often high-performing, are a type of keyword, not a match type, and their bid depends on competition. Phrase match and broad match are less restrictive match types. Phrase match allows for additional words before or after your keyword, and broad match allows for a wide range of related searches, including synonyms and misspellings. Because these match types cast a wider net, they generally have lower conversion rates and thus lower average bid amounts compared to exact match.