This question tests the correct use of modal verbs for different communicative functions, specifically expressing a suggestion. **Core Concept:** Modal verbs express ideas like possibility, necessity, permission, and suggestions. The modal verb 'should' is commonly used for giving advice or making suggestions. **Correct Answer (C):** The sentence uses 'should' to make a suggestion, indicating that trying the new restaurant is a good idea, without imposing it as a necessity. **Incorrect Option Analysis:** * **A:** 'Will' expresses a future action or prediction, not a suggestion. * **B:** 'Must' expresses obligation or necessity, not a suggestion. * **D:** 'Can' expresses ability or possibility, not a suggestion. **Key Points:** Understanding the function of various modal verbs is critical. 'Should' is specifically used for making suggestions and giving advice. **Error Prone Areas:** Students might confuse modal verbs used for advice/suggestions with those expressing obligation or ability. Remembering the specific function each modal verb performs is key.