I want to say this following sentence.
The decisions in making a project plan that are affected by variable X are presented in Table 4.1
However, the grammarly, a grammar software, says that my sentence should be
The decisions in making a project plan that is affected by variable X is presented in Table 4.1
The software argues that the "be" explain the word "plan". Meanwhile, I want to explain the word "decisions" instead of "plan".
How should I write the proper sentence?