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.

  Option- B

75 cm at 12:30 p.m.                                                                            

Explanation:

Without knowing the length of the stick, José and Laurel measured the length of a stick's shadow during the day time of noon. As, the shadow at this time is the shortest of all, as the length of the stick can be perfectly measured with the help of different and advance form of tools.                                                                    

Answer (d) the greenhouse effect is primarily caused by car and trucks;

D.