Final answer:
The net magnetization precessional frequency would be 3.0 Hz.
Step-by-step explanation:
The net magnetization precessional frequency can be calculated using the formula:
ω = γB
Where ω is the precessional frequency, γ is the gyromagnetic ratio (a constant for a given magnetic material), and B is the magnetic field strength. In this case, the magnetic field strength is given as 3.0 (units not specified). Therefore, the net magnetization precessional frequency would be 3.0 Hz (Option A).