Which statement about (3t+15) is true? The value 3 is a coefficient, and the value 15 is a constant in the expression (3t + 15).

O The value 3 is a constant, and the value 15 is a coefficient in the expression (3t+15).

O The values 3 and 15 are both coefficients in the expression (3t + 15).

The values 3 and 15 are both constants in the expression (3t + 15).