Final answer:
The true statement from the given information is that the mass is 0.49 kg. The spring constant, amplitude, and frequency are not directly provided.
Step-by-step explanation:
Given the provided information about a 0.49-kg mass suspended from a spring with a period of 1.7 s, the true statement that can be deduced is: a. The mass is 0.49 kg. Details such as the spring constant, the amplitude of oscillation, and the frequency are not directly provided by this statement. We can infer the mass since it is given explicitly. Frequency can be calculated using the period (frequency is the reciprocal of the period), but it is not directly given.