A High Quality Score Can
A high Quality Score can: A) be assigned to negative keywords B) improve an ad's position C) be achieved with an increase in bid D) prevent an ad from being served Explanation : Quality Score is an estimate of the quality of your ads, keywords, and landing pages. Higher quality ads can lead to lower prices and better ad positions. Source : https://support.google.com/adwords/answer/140351?hl=en