A monkey which climbs 30 feet at the beginning of each hour and rests for a while then he slip back 20 feet before he again starts climbing in the beginning of the next hour. If he begins his ascent at 8:00 a.m., at what time will he first touch a flag at 120 feet from the ground?

• A. \[4:00\text{ }p.m.\]
• B. \[5:00\text{ }p.m.\]
• C. \[6:00\text{ }p.m.\]
• D. \[2:00\text{ }p.m.\]
• E. None of these