1. The problem asks to simplify the expression $3t \cdot 3(-t)$. 2. The expression involves multiplication of terms. Recall the rule: when multiplying, multiply coefficients (numbers) and variables separately. 3. Multiply the coefficients: $3 \times 3 = 9$. 4. Multiply the variables: $t \times (-t) = -t^2$. 5. Combine the results: $9 \times (-t^2) = -9t^2$. 6. The simplified expression is $-9t^2$. 7. Since the options are numbers and the expression depends on $t$, none of the options match the simplified expression exactly. However, if $t=1$, then $-9t^2 = -9$, which is not among the options either. 8. Therefore, none of the given options A, B, C, or D correctly represent the simplified expression $3t \cdot 3(-t)$.