Select the definition below that best describes effective reach, effective frequency, or continuity. 1. Percentage of people receiving enough exposures to notice a message 2. Average number of times someone must see a message in order for it to be effective 3. Number of times an ad will be seen over a specified time period 4. Falls somewhere between minimum level that achieves message awareness and max level that becomes overexposure 5. Describes the quality of an exposure