Concept:
Question tags are short questions added at the end of statements. Special rules apply for sentences beginning with
Let's.
Step 1: Identify the sentence type.
The sentence begins with:
which is a suggestion.
Step 2: Recall the grammar rule.
For suggestions beginning with
Let's, the standard question tag is:
Examples:
• Let's go for a walk, shall we?
• Let's start the meeting, shall we?
Step 3: Apply the rule.
The sentence becomes:
Step 4: Conclusion.
Hence, option (C) is correct.