My grammar is admittedly pretty farm boy, so I thought I’d check. You seem like a bit off an ass but someone else reading this might take it as legitimate:

Some authorities prescribe that restrictive relative clauses (where the relative clause is part of the identification of the noun phrase) should only use that as the introductory pronoun, and non-restrictive relative clauses should only use which or who/whom as the introductory pronoun. In practice, either pronoun is commonly used to introduce a restrictive relative clause, including in edited prose. In contrast, it is not usual in edited written English to use that to introduce a non-restrictive relative clause, though there are occasional rare attestations.

https://en.wiktionary.org/wiki/that

I saw at least one typo there and figured I’d leave it for you