The C++ programming language was developed at AT & T Bell Laboratories in the early _______ by Bjarne Stroustrup.

Correct option is A

The correct answer is (a) 1980s.
· The C++ programming language was developed by Bjarne Stroustrup at AT&T Bell Laboratories in the early 1980s.
· C++ was designed as an extension of the C programming language with the addition of object-oriented features.
· The first version of C++ was released in 1983, and it has since become one of the most widely used programming languages in the world, particularly in systems and application software, drivers, client-server applications, and embedded firmware.