11.) The Wright Brothers were who tested gliders when they began construction on a glider that
could be propelled through the air by an internal engine.
a. amateur automobile makers and enthusiasts, combustion
b. bicycle shop owners, steam
c. bicycle shop owners, combustion
d. engine manufacturers, rotary

b. bicycle shop owners, steam

Explanation:

The Wrights opened a bicycle sales and repair shop called the Wright Cycle Exchange at 1005 West Third Street in Dayton, OH in 1892. At the time of the brothers first flight, most of their contemporaries did not use gasoline powered internal combustion engines for flight, they used steam power in their early designs.

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