Correct Answer & Explanation
Option C
• The adverb 'rarely' indicates a habitual or routine action.
• For habitual actions, the Present Indefinite Tense (Simple Present) is used.
• 'Sleeps' is the correct form for a third-person singular subject ('My mother') in the Simple Present Tense.
• Options A (Present Continuous), B (Present Perfect), and D (Simple Past) are incorrect for expressing a regular habit.