Change the following sentence into the active voice; also revise the sentence for clarity and brevity: The validity of self-report of raised nevi over the telephone was evaluated in comparison to dermatological examination among a sub-sample of 25 subjects from the total sample of 100.

  i think you forgot to put the options but if your reffering to this question then your answer will be "b"  a. add "to" to the base form to create an adjective.b. when the subject of a sentence is singular, add "–s" to the base form.c. add "–ed" to irregular base forms to form the past participle.d. do not use a base form with plural subjects