Two laboratories use radiocarbon dating to measure the age of two wooden spear handles found in the same grave. Lab A finds an age of 2250±40 years for the first object; lab B finds an age of 2215±50 years for the second object. Which of the following is true?
A. Lab A’s reading is more accurate than lab B’s.
B. Lab A’s reading is less accurate than lab B’s.
C. Lab A’s reading is more precise than lab B’s.
D. Lab A’s reading is less precise than lab B’s.