Rules for writers, Tenth edition - Diana Hacker, Nancy Sommers 2021

Avoid making broad references with this, that, which, and it
Make pronoun references clear
Grammar

For clarity, the pronouns this, that, which, and it should ordinarily refer to specific antecedents rather than to whole ideas or sentences. When a pronoun’s reference is needlessly broad, either replace the pronoun with a noun or supply an antecedent to which the pronoun clearly refers.