Read this sentence: "There is several important points that you should know if you plan to implement time-out." Which revision corrects it?

1. In a sentence that opens with "there," the real subject comes after the verb: "several important points." 2. "Points" is plural, so the verb must be "are," not "is." 3. Changing "is" to "are" makes the subject and verb agree, option D. 4. "Know" and "plan" already agree with "you," so changing them creates new mistakes. _Source: OpenStax Psychology 1e (CC BY 4.0), Ch 6 "Learning", section 6.3 Operant Conditioning_