Two quartz clocks are being tested against a standard clock located in a national laboratory. At 12:00:00 noon by the standard clock, the readings of the two clocks are:

Question

	Clock I	Clock II
Monday	12 : 00 : 05	10 : 15 : 06
Tuesday	12 : 01 : 15	10 : 14 : 59
Wednusday	11 : 59 : 08	10 : 15 : 18
Thursday	12 : 01 : 50	10 : 15 : 07
Friday	11 : 59 : 50	10 : 14 : 53
Saturday	12 : 01 : 30	10 : 15 : 24

If you are doing an experiment that requires -precision time interval measurements, which of the two clocks will you prefer?