Choose which one goes into the sentence.

Complex Calendars.

Explanation:

The Mayans were one of the first to create calendars, using observatories to take note of the stars and how they "rotated the earth". Using such, they could determine the approximate time as well as seasons.

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salt is a type of solid, which means that it will when placed in water.

  a.  

soluble, float

  b.  

soluble, dissolve

  c.  

insoluble, settle

  d.  

insoluble, dissolve

c

that should be it

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srry