Keyboards require a device driver

You are writing software for a robot that operates in an environment where the robot is buffeted by time- varying forces. You have derived a formula that represents the force on the robot as a function of time. Now you would like to determine a time when this force is very close to zero. You should try using

a. Euler or Runge-Kutta method b. central difference formula c. Simpson's or trapezoidal rule d. Newton's or bisection method

In the CentOS 7 CLI, you create a directory using which command?

A. mkdir B. CHDIR C. MD D. cd