1. Identification of Error: Subjunctive Mood and Parallelism. 2. Grammatical Rule: Verbs like 'demand,' 'stipulate,' 'recommend,' etc., when followed by 'that' and a subordinate clause, require the verb in the clause to be in the mandative subjunctive (base form of the verb), regardless of the subject's number. Additionally, elements in a compound structure must maintain parallel grammatical form. 3. Option Elimination: A. Incorrect — "was to declare" violates the mandative subjunctive rule (should be 'declare'). "and that an annual report was also submitted" breaks parallelism with the initial clause and incorrectly uses the indicative 'was submitted' instead of the subjunctive. B. Incorrect — While "declare" is correct, "and that an annual report be also submitted" breaks parallelism because the first part has "executive declare" (active voice, specific subject) while the second shifts to "that an annual report be submitted" (passive voice, different subject structure), creating an awkward and less concise construction. C. Correct — "declare" correctly uses the mandative subjunctive. "and also submit an annual report" maintains parallelism with "declare" (both being base verbs taking 'every executive' as the implied subject) and correctly employs the subjunctive form while being concise and grammatically sound. D. Incorrect — "should declare" is an acceptable alternative to the mandative subjunctive, but the second part, "and that an annual report also be submitted," suffers from the same parallelism and structural issues as option B.