68. Arduino is an open-source hardware and software company, project, and user community that designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices. Arduino board designs use a variety of microprocessors and controllers. The boards are equipped with sets of digital and analog input/output (I/O) pins that may be interfaced to various expansion boards or breadboards and other circuits. Arduino gains its popularity in school because it (A) is easier to be implemented (B) is computationally powerful than personal computer is (C) provides precise computational data (D) is the standard in industry