Whitc sentence from the passage best supports the authors claim that henriettas cells have been widely used by scientists

Some one drawing water and my theater placed my hand under the spout. as the cool stream gushed over one hand she spelled into the other the word water , first slowly , then rapidly . i stood still ,my whole attention fixed upon the motions of her fingers . suddenly i felt misty consciousness as of soothing forgotten --a thrill of returning thought and somehow the mystery of language was revealed to me this passage from the stoyof my life is an wxample of which element of plotclimax action

What is wrong with they follow citation of a book with two authors

Aprimary source: a- may be biased b- is never biased c- cannot possibly have bias d- none of the above