Consider the circuit shown in the figure with input $V(t)$ in volts. The sinusoidal steady state current $I(t)$ flowing through the circuit is shown graphically (where $t$ is in seconds). The circuit element $Z$ can be ____________.
- a capacitor of $1 \; \text{F}$
- an inductor of $1 \; \text{H}$
- a capacitor of $\sqrt{3} \; \text{F}$
- an inductor of $\sqrt{3} \; \text{H}$