It Took 66 Hours of Analysis to Complete the First

Multiple Choice

It took 66 hours of analysis to complete the first phase, but the second phase was done in 61 hours. If this learning rate continues, then the 8^th analysis should take a mere:

A) 52 hours and 11 minutes, give or take.
B) 53 hours and 22 minutes, give or take.
C) 54 hours and 33 minutes, give or take.
D) 55 hours and 44 minutes, give or take.