What is a keyword bid?
Specifies the number of times your ad is displayed in a given month.
Specifies the maximum price you are willing to pay each time someone clicks your ad.
Specifies how closely a search query must match your keyword.
Specifies what price you must pay for your keywords in order to reach position one.
Specifies the maximum price you are willing to pay each time someone clicks your ad is a Keyword bid.
This question is a part of Microsoft Advertising Certified Professional Exam. You can read all the right answers here : Bing Ads Accreditation Exam Answers