Read the passage carefully to determine its central idea and supporting evidence. Then choose the phrase that best completes each sentence. The central idea is that ancient Egyptians . The central idea is supported by the fact that a family with more money could

  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