Objective-C is a general-purpose, object-oriented programming language that adds Smalltalk-style messaging to the C programming language. It was the main programming language used by Apple for the OS X and iOS operating systems, and their respective application programming interfaces (APIs) Cocoa and Cocoa Touch prior to the introduction of Swift.
Objective-C is, overall, the main object-oriented programming language.
A: It's impossible to say

The site of a former distillery in Three Mills became a dedicated centre for film and television production with the establishment in the 1980s of Bow Studios, Three Mills Island Studios, and Edwin Shirley Productions. In the mid-1990s the three studios merged to become 3 Mills Studios, under the management of Workspace Group.
Workspace Group managed 3 Mills Studios.
A: Yes

Prinair Flight 191 was a Prinair (Puerto Rico International Airlines) flight from Luis Munoz Marin International Airport in San Juan, Puerto Rico, to Mercedita Airport in Ponce, Puerto Rico. At approximately 11:15pm on 24 June 1972, the aircraft crashed while attempting to land at Mercedita Airport. Five people died in the accident. and the remaining people were injured.
Everyone on Prinair Flight 191 was either killed or hurt.
A:
Yes