José and Laurel measured the length of a stick's shadow during the day. Without knowing the length of the stick, which of their measurements would you ask José and Laurel to examine more closely? A. 50 cm at 6:00 a.m. B. 75 cm at 12:30 p.m. C. 42 cm at 5:45 p.m. D. 55 cm at 7:15 p.m.