The phrase "watches of the night" usually refers to the rounds made by a guard. what does the phrase mean in line 1?

The unblocking of popular social media websites in myanmar is an indication that.

What task did the surveyors do? a. they studied the landscape to determine the most direct route for building a road. b. they designed treadmills that lifted blocks of stone to where they were needed. c. they dug trenches and filled them with sand, concrete, and large blocks to form a road.

What’s the answer. i need the answer fast