A - true
because is known that asbestos can produce lung cancer or other type of cancer
To aid us in understanding a time in history
To aid us in understanding a person or culture
1.It's A because 'as' should have been used, meaning 'which'. 'I will refuse his demands which are outrageous '.
2.But' unless' has nothing to do with the context provided in C because 'until' should have fitted here.
Answer:
A
Explanation:
it does not have any serious words
