AWS RoboMaker - Sample Application - Hello World - Stuck

Hi Amazonians,

I am trying the tutorials in AWS RoboMaker Developer Guide, specifically this part:

AWS RoboMaker Developer Guide
Getting Started
Step 3: Configure Environment and Build Applications
Modify and Build Applications
3. In the HelloWorld AWS Cloud9 development environment, choose Resources, then choose Download samples, and then select 1. Hello World.

Link: https://docs.aws.amazon.com/robomaker/latest/dg/gs-build.html

Half way downloading the samples, the terminal prompted me for a decision:

debconf: falling back to frontend: Readline
 Configuring unattended-upgrades 
 ------------------------------- 
 
 A new version (/etc/apt/apt.conf.d/50unattended-upgrades.ucftmp) of 
configuration file /etc/apt/apt.conf.d/50unattended-upgrades is available, but 
the version installed currently has been locally modified.

   1. install the package maintainer's version 
  2. keep the local version currently installed
  3. show the differences between the versions
  4. show a side-by-side difference between the versions
  5. show a 3-way difference between available versions 
  6. do a 3-way merge between available versions
  7. start a new shell to examine the situation

What do you want to do about modified configuration file 50unattended-upgrades? 1
1
1.
1. 
1. install
1. install the package maintainer's version
2
2. 
2.
2. keep         
2. keep the local version currently installed
^[[A    
^[[B
^[[D^[[C

^C

Process exited with code: 0

Pane is dead

I have been trying to get through the prompt by typing the numbers, the sentence, up and down, but everything fails. Finally, I ended the process using Ctrl + C.

This seems like a very dumb question but I just can't continue the tutorial. I have been Googling as well but to no avail. Any help or guide from Amazonians would be much appreciated!! Thank you very much!! :)