Maybe this helps:
Conjugation of 'Sing'
Base Form (Infinitive): Sing
Past Simple: Sang
The answer would be C because an autobiography is a life story written by the person the story is about
What exactly are we looking for?
Its <u><em>valid</em></u>
VALID is something that is very logical and makes sense in the topic situation
The answer is therefore <u><em>VALID</em></u>
Answer:
D - Idea's that can be shown to be true by research