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OpenStudy (anonymous):

The hot-air balloon launched by the Montgolfier brothers in 1783 was the ___ of the modern airplane. A. precursor B. conglomeration C. valor D. celerity

OpenStudy (anonymous):

@inowalst

OpenStudy (inowalst):

What do you think?

OpenStudy (anonymous):

c

OpenStudy (anonymous):

so im i right??

OpenStudy (inowalst):

C is wrong. Try again.

OpenStudy (anonymous):

A??

OpenStudy (anonymous):

or c

OpenStudy (inowalst):

A is right.

OpenStudy (anonymous):

yeah! another one bro ???

OpenStudy (inowalst):

Sure.

OpenStudy (anonymous):

its a

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