Problem Question 7.1

Hi, everyone!
I ask you advice with Question 7.1

Which of the statements below is correct?
A. apt is the low-level tool that mainly interacts with local packages
B. dpkg is the high-level tool that is aware of all available packages, including packages on remote servers
C. dpkg -l lists all installed packages on the system

I now the answer( can I print it here?), but system says that it is't correct. When I try to review answered question I see that my answer wrong, but no any correct. I try maybe another - same result.