Combine these 3 sentences to one sentence:
milk products contain lactose.
lactose is milk sugar.
lacy is allergic to lactose.

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.