The main idea of nullification was that
the president could enact any law that he
the supreme court could overturn presidential decisions
congress had power over the supreme court
states could override federal laws

The correct answer is states could override federal laws.

Nullification is the idea that states have the ability to override federal laws if they believe that the law in question is unconstitutional. This idea has never been supported by the US courts but has been used several different times to justify state actions. This includes the Virginia and Kentucky Resolution that was developed during the presidency of John Adams. This idea was also used in the Nullification Crisis in the 1820's by the state of South Carolina.

the andes or andean mountains (spanish: cordillera de los andes) are the longest continental mountain range in the world, forming a continuous highland along the western edge of south america. this range is about 7,000 km (4,300 mi) long, about 200 to 700 km (120 to 430 mi) wide (widest between 18° south and 20° south latitude), and of an average height of about 4,000 m (13,000 ft). the andes extend from north to south through seven south american countries: venezuela, colombia, ecuador, peru, bolivia, chile and argentina.

from wikipedia

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radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.