Although I got this wrong - The correct choice is 'B'.
OE: Conditional constructions require specific verb tenses. For a present condition, like this debate between academicians, the subordinate clause introduced by if uses the present indicative, and the main clause uses the future tense: y will happen (main clause) only if x happens (subordinate clause). Logically, the course is to be both separate and required, so the two adjectives should equally modify the noun and thus be separated by a
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OE: Conditional constructions require specific verb tenses. For a present condition, like this debate between academicians, the subordinate clause introduced by if uses the present indicative, and the main clause uses the future tense: y will happen (main clause) only if x happens (subordinate clause). Logically, the course is to be both separate and required, so the two adjectives should equally modify the noun and thus be separated by a
...
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