The mean length of steel bolts from a manufacturing process is advertised as 17.1mm. An inspector believes that this value is not correct. To investigate the inspector's claim, the lengths of a random sample of 25 bolts are measured. Which statistical test should be used to compare the measured lengths to the advertised mean?

a) One-sample t-test
b) Paired t-test
c) Independent samples t-test
d) Chi-square test