Sg/Pl after enumeration

[Sunshine]

Is it possible to enumerate 5 reasons and to start a new sentence after the reasons with "That are enough reasons for this aspect."

Can I use "that" in the singular or do I need a plural here?

Thanks for your help.

[svartnik]

Is it possible to enumerate 5 reasons and to start a new sentence after the reasons with "That are enough reasons for this aspect."

Can I use "that" in the singular or do I need a plural here?

Thanks for your help.

that singular, those plural

"That" is a pronoun but not a relative pronoun, so, "that" can refer to one thing and not more.

[Sunshine]

Thanks for your help.

So, "Those are enough reasons..." would be correct then?