Correct Answer & Explanation
Option A
• This sentence states a universal truth or a natural phenomenon.
• Universal truths and permanent facts are always expressed in the Present Indefinite Tense (Simple Present).
• The structure for Present Indefinite Tense is Subject + V1 (s/es for 3rd Person Singular) + Object.
• 'The sun' is a 3rd person singular subject, so the verb 'rise' takes 's' and becomes 'rises'.