のことだから

Usage

Used to predict the actions of a person that the speaker knows well. Implies definite conviction

それは、私にとって重要なことだから答えて It is very important for me, so please answer it

明るい彼女のことだから、どこへ行ってもすぐ友達ができるでしょう Since she has a bright personality, she is able to make friends no matter where she goes