[Grammar] this or these

[uktous]

Hi,

Question:
Should I use "this or these".

Sentence:
I am good at football and tennis. This / These can be shown by my achievements.

Opinion:
Both can be used.

Using "this" will mean that "I am good at sth" can be shown by my achievements.

Using "these" will mean that "my footalls skills and tennis skills" can be shown by my achievements.

Thanks

 

[Offroad]

I believe only 'this' is correct.

This [the fact that I am good at sports] can be shown...


[I am not a teacher]