Select the option that arranges the given sentences in the correct sequence. The first sentence is in the correct position.
A. Mrs Salmon who lived at 15, Northwood Street had been unable to sleep.
B. He had a hammer in his hand and had just come out of her house.
C. But when she went to the window she saw Adams standing on the steps of Mrs Parker’s house.
D. She heard a door click shut and thought it was her own gate.

Correct option is C

Option (c) is the correct answer.
Start with:
A. Mrs Salmon who lived at 15, Northwood Street had been unable to sleep.
This introduces the main subject, Mrs Salmon. So it rightly comes first.
A. Mrs Salmon who lived at 15, Northwood Street had been unable to sleep.
D. She heard a door click shut and thought it was her own gate.
→ Explanation: Logically follows A. If she couldn't sleep, hearing a sound would naturally catch her attention.
C. But when she went to the window she saw Adams standing on the steps of Mrs Parker’s house.
→ Explanation: After hearing a sound, she goes to the window to check. The use of “But when she went...” fits nicely as a consequence of D.
B. He had a hammer in his hand and had just come out of her house.
→ Explanation: Now we get the identity and suspicious behavior of the man she sees: he had a hammer and had exited Mrs Parker's house. This completes the scene she witnesses.