What caused Francesco Lana to plan an airship? A.
the measurement of mercury
B.
the invention of balloons
C.
the mixture of different gases
D.
the discovery of air having weight

I think it's B. the invention of balloons

Explanation:

"It is no exaggeration to say that Lana's ideas lay behind the development of the balloon and led to the successful flight of the Montgolfier brothers in 1783."

source- http://www.faculty.fairfield.edu/jmac/sj/scientists/lana.htm

hope this helps :-)

the correct answer is "dissent"

explanation:

because dissent is when one or more judges express disagreement with the majority in court, in specific legal systems.   an   argument in opposition is presented to the court, with a different interpretation, or application.