What can readers infer about the time period of the
passage?
Knowledge of medicine was limited.
Availability of doctors was limited.
O Servants' wages were minimal.
Servants' social status was changing.

  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

There should be a period at the end of the sentence.