The correct answer is: A. on
The word “on” is used to indicate a location or position. In this case, the speaker is suggesting that they go to the location where the noise is coming from.
The other options are not as likely to be correct. The word “in” is used to indicate a location or position inside something. The word “for” is used to indicate a purpose or reason. The word “about” is used to indicate a topic or subject.
Here is a more detailed explanation of each option:
A. on
The word “on” is used to indicate a location or position. In this case, the speaker is suggesting that they go to the location where the noise is coming from. For example, they might say, “What a noise! Let’s go and see what’s on the other side of that door.”B. in
The word “in” is used to indicate a location or position inside something. In this case, the speaker is not suggesting that they go inside the location where the noise is coming from. For example, they might say, “What a noise! Let’s go and see what’s in that box.”C. for
The word “for” is used to indicate a purpose or reason. In this case, the speaker is not suggesting that they go to the location where the noise is coming from for a specific purpose. For example, they might say, “What a noise! Let’s go and see what’s for dinner.”D. about
The word “about” is used to indicate a topic or subject. In this case, the speaker is not suggesting that they go to the location where the noise is coming from to talk about something. For example, they might say, “What a noise! Let’s go and see what’s about to happen.”