Standing at (1)/ the top of the hill, (2)/ the houses below were hardly visible. (3)/ No error (4).

Options

A. 1. Standing at
B. 2. the top of the hill,
C. 3. the houses below were hardly visible
D. 4 No error

Answer

4

Explanation

No error.
at the top `rarr` very near the top
on the top `rarr` more precise location