Explanation:

- Q: "she knew that the answer"

- This part introduces the awareness of a solution or idea.

- P: "lay outside her existing life"

- This phrase suggests that the solution is beyond her current experiences.

- R: "somewhere in the back of her mind"

- Implies that the thought is subconscious or not fully realized.

- S: "to her questions about life"

- Refers to questions she has regarding life.

Option 1: R P Q S

- Order: "somewhere in the back of her mind, lay outside her existing life, she knew that the answer, to her questions about life"

- Doesn't flow correctly in English.

Option 2: Q S P R

- Order: "she knew that the answer, to her questions about life, lay outside her existing life, somewhere in the back of her mind"

- Somewhat makes sense but not optimal.

Option 3: Q P S R

- Order: "she knew that the answer, lay outside her existing life, to her questions about life, somewhere in the back of her mind"

- This sequence creates a logical flow and is clear.

Option 4: R Q S P

- Order: "somewhere in the back of her mind, she knew that the answer, to her questions about life, lay outside her existing life"

- Illogical sequence in context.