Student or Learner
In the 1970's elite preschool in New York City had
approximately 150 applications per year, and by the 1990's, this number rose to 3000.
The underlined portion should be had risen, right?
Now my question is: If there are two clauses in a sentence, can one verb in one clause depends on the other clause? I know it is a silly question. But please spare me:(