Probably (b) or (c)is closest - CORBA allows integration between distributed and discrete technologies, but you could argue the toss for any of these answers (i.e. it's a bad question).

CORBA is a standard. Compliance with a standard requires programming acording to certain rules. Does this make CORBA a 'programming technology'? I don't know - the term 'programming technology' is too broad to make any real sense to me.

CORBA facilitates integration, although integration is too broad a term for full discussion - are we integrating technologies? functionality? objects? I guess it works on all of these levels, but again integration is so generic that there may be arguments against describing CORBA as an integration technology. (In fact some people might argue against use of the term 'technology' at all when referring to CORBA...) Like I said, the question is too vague...

Dermot