Single/multi-select question: Does the sentence "The system used a centralised control system including both search and targeting radar, which calculated the aim point for the guns after considering windage and ballistics, and then sent electrical commands to the guns, which used hydraulics to point themselves at high speeds." provide a valid answer to the question "What type of control system did the 55 millimeter gun use?"
Possible answers: a). yes; b). no;
a).