Which one of the following sentence sequences creates a coherent narrative? (i) Once on the terrace, on her way to her small room in the corner, she notices the man right away. (ii) She begins to pant by the time she has climbed all the stairs. (iii) Mina has bought vegetables and rice at the market, so her bags are heavy. (iv) He was leaning against the parapet, watching the traffic below.

To form a logical and coherent narrative:

1. Sentence (iii) introduces the subject (Mina) and establishes the initial context (carrying heavy grocery bags from the market).

2. Sentence (ii) logically follows as a consequence of carrying heavy bags—she pants while climbing the stairs.

3. Sentence (i) describes her arrival at the top ("Once on the terrace...") and introduces a new entity ("she notices the man right away").

4. Sentence (iv) describes what "the man" introduced in sentence (i) was doing ("He was leaning against the parapet...").

Therefore, the correct sequence is (iii), (ii), (i), (iv), which corresponds to (D).