Correct Answer:
Option A - In the above sentence 'across' will be used in the blank space because 'came across' (Phrasal verb) which means 'to meet or find some body/something by chance' gives appropriate meaning.
Other options given different meaning.
Correct sentence -
The frightening sound came from across the river.
A. In the above sentence 'across' will be used in the blank space because 'came across' (Phrasal verb) which means 'to meet or find some body/something by chance' gives appropriate meaning.
Other options given different meaning.
Correct sentence -
The frightening sound came from across the river.