If the 'all caps' were to be retained, is the following sentence grammatically correct in every way?

Question

CNN'S AND BBC'S ONLY REPORT, WE MAKE THE NEWS.

Answer 1

Grammatically, only CNN and BBC are to be in caps and the rest should be in lower case.

Answer 2

only CNN and BBC will be in caps and the other will be in lower case.

Answer 3

There is no "case" study involved here.The sentence is

grammatically incorrect.

Answer 4

No. There are two independent clauses, so you use a semicolon, not a comma.

CNN'S AND BBC'S ONLY REPORT; WE MAKE THE NEWS.

The use of 'S is somewhat questionable. The rule for making initialisms plural is to just add 's' - CNNs, BBCs. But that does not consider the 'all caps' restraint. The rule that seems to fit is:

8.11. While an apostrophe is used to indicate possession and

contractions, it is not generally necessary to use an

apostrophe simply to show the plural form of most acronyms,

initialisms, or abbreviations, except where clarity and sense

demand such inclusion.

That's from the U. S. Government Printing Office Style Manual. This seems to be one of those occasions where clarity demands the inclusion.