单选题 Structured programming practices (71) rise to Pascal, in which constructs were introduced to make programs more readable and better (72) C provided a combination of assembly and high -level structure to create a general -purpose language that could be used from system to (73) programming. Next came object orientation, which is (74) of a metrology and design philosophy than a language issue. This is (75) by the addition of so - called OO extensions to current language, such as C++.