Which of the following is the most objective and concise?
A、 If you can control the trains this way, they will be able to run more safely and quickly.
B、The use of this method of control unquestionably leads to safer and faster train running.
C、We can use this method to control the trains to make them run more safely and quickly.
D、It is undoubted that trains can run more safely and quickly if they are controlled in this way.