Why did the u. s. and allied forces invade afghanistan after 9/11?
a. they knew the taliban was responsible for the attacks.
b. they knew the ba'ath party was responsible for the attacks.
c. they knew that afghanistan was harboring osama bin laden and other members of al-qaeda.
d. they knew that afghanistan was building a nuclear arsenal and planning to use dirty bombs on the u. s.

The answer is C. They knew that Afghanistan was harboring Osama bin Laden and other members of al-Qaeda.

supongo que te refieres al paralaje estelar (observable).

si es así, entonces se puede inferir que la estrella está a más de 200 parsecs.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).