HMS, BM EQ-Bank 802 MC

Based on the heart rate data shown in the table below, which conclusion is MOST supported by the evidence?

\begin{array}{|l|c|c|c|c|}
\hline \textbf{Training Type} & \textbf{Week 1 RHR} & \textbf{Week 2 RHR} & \textbf{Week 4 RHR} & \textbf{Week 4 RHR} \\
\hline \text{Running} & \text{75 bpm} & \text{72 bpm} & \text{69 bpm} & \text{67 bpm} \\
\hline \text{Cycling} & \text{76 bpm} & \text{73 bpm} & \text{69 bpm} & \text{66 bpm} \\
\hline \text{Swimming} & \text{74 bpm} & \text{73 bpm} & \text{71 bpm} & \text{70 bpm} \\ \hline
\end{array}

1. Swimming is the most effective activity for reducing resting heart rate
2. All three training types are equally effective at reducing resting heart rate
3. Both running and cycling produced significantly better reductions in resting heart rate than swimming
4. The training program was too short to draw any meaningful conclusions