Does "The rise of port cities saw the clustering of populations caused by the development of steamships and railroads." contain the correct answer to "Steamships and railroads rose with what else?"

A: yes

Does "They purged monarchists and members of Idris' Senussi clan from Libya's political world and armed forces; Gaddafi believed this elite were opposed to the will of the Libyan people and had to be expunged." contain the correct answer to "What happened to Idris?"

A: no

Does "Aircraft which are only passing through the airspace must also contact Tower Control in order to be sure that they remain clear of other traffic." contain the correct answer to "Why should aircraft that is only passing through an airspace contact Tower Control?"

A:
yes